Promises may be broken, locked up we may be and indeed the Ummah may be surrounded from all sides, but the Word of Allaah has already gone forth.
One by one our scholars may be silenced, our children muted and our Islamic heritage eliminated, but the Word of Allaah has already gone forth.
The Ahzaab may reform, treachery may reappear and the mountains may shake but the Word of Allaah has already gone forth.
Certainty is something that this Ummah will never lose and can never lose.
It is inseparable from our Imaan to the extent that the scholars, when defining the Shahaadah (testimony) listed it to be from its prime conditions.
As we look around the world today, we are in great need of our yaqeen - our conviction and certainty in the fact that the Word of Allaah has already gone forth:
“And verily our Word has gone forth to our slaves, the Messengers
That they verily, will be triumphant
And that our hosts (the believers)! They indeed, will be victorious.”
When the tartars approached the Muslims in Damascus, the public went into mass panic and fear. But amongst them was the great scholar and mujahid Ibn Taymiyyah (rahimahullaah) who returned courage to the people and to the central army by saying, “Allaah will grant us victory!” The generals asked him to say ‘Insha-Allaah’ for fear that his statement could fall short, but Ibn Taymiyyah replied back, “I say it in certainty and not in mere hope!”
As believers in Allaah we have to possess that certainty and conviction held by our pious predecessors and the righteous that followed them. We see that some of them would be overtaken by petrifying circumstances and many times they would be up against the worst, but this neither shook their Imaan in Allaah nor their yaqeen in His Nasr (Help).
Our eyes and ears may tell us one thing, but our yaqeen will always direct us to the true reality of affairs and the direction in which they are ultimately headed.
“And that our hosts (the believers)! They indeed, will be victorious.”
The Command of Allaah has already preceded and there is not a matter except that it is bound by the Sunan of Allaah. And likewise, Allaah has made it a Sunnah of His that His Jund -the true believers- will continue to be aided and be victorious until the end of time. Nations rise and fall as a result of this firmly established principle of Allaah, which we fail to take lessons from time and time again.
All of creation and indeed this whole universe run only at the Command of Allaah and when Allaah decrees victory, there is nothing in the heavens or in the earth that has the power to stop it. In fact, the universe itself and all that is in it, is subjected to deliver the victory to the victors - the true believers. And indeed, whoever obeys Allaah and strives therein will have the dunya subjected to him, and it will come to him in haste.
The honoured companions of the Messenger (sallallaahu `alayhi wa sallam) only knew this too well. Their absolute trust, certainty, obedience and unshakeable belief saw them through ghastly battles with which they were at extreme odds with. One would expect a crushing defeat but the outcome was always a clear victory. And how can it not be so when Allaah has declared,
و كان حقا علينا نصر المؤمنين
And it was incumbent upon Us to help the believers
The sun halted at the Command of its Lord in order to deliver victory to the Army of Yusha’ ibn Nun - the Prophet of Bani Israel after Musa (`alayhumasalaam). It is mentioned in Sahih Muslim that when he drew closer to the town and prayed ‘Asr, he looked at the sun which was about to set and he cried out, “You are commanded, and I have been commanded! O Allaah, halt it and withhold it.” So it was halted (from setting) until he was granted victory. 
We also have the likes of al-Baraa’ ibn Maalik whose oaths were always fulfilled by Allaah. In the heat of battle, the Muslims would cry out, ‘O Baraa! Make an oath by your Lord!’ So he would say, ‘O my Lord! I take an oath by You that you give us victory!’ And the enemy would be utterly defeated. This was seen on the day of Tustar when al-Baraa ibn Maalik called out, “O my Lord! I take an oath by You that you confer victory upon us and you make me the first martyr!” The final outcome? A swift victory and martyrdom for al-Baraa ibn Maalik (radhi Allaahu ‘anhu).
And Saariyah did not hear wrong when he heard what he heard…
As ‘Umar ibn al-Khattaab (radhi Allaahu ‘anhu) was giving his khutbah, he suddenly said, “Ya Saariyah, the mountain! Ya Saariyah, the mountain!”
Saariyah was a mujaahid appointed by ‘Umar as the leader of the Muslim army. The army had already been sent out and between them and ‘Umar was the distance of one month’s journey.
A month later, a bringer of glad tidings returned from that Muslim army saying that they had almost been defeated when they heard a voice proclaiming ‘O Saariyah, the mountain! O Saariyah, the mountain! So they put their backs to the mountain and Allaah defeated the enemy. 
And numerous are the miraculous scenes in the field of Jihaad. So no doubt victory will arrive, but victory has its victors - those who are guided by the light of certainty and Imaan and it is they who will carry the word of Allaah which has already gone forth.
The final outcome will always be for the Deen of Allaah, and none are given to inherit the earth except the righteous, believing servants of Allaah.
“Allaah has decreed: Verily, it is I and My Messengers who shall be the victorious”
And never can there be a change in the Sunnah of Allaah. We ask Allaah to give us yaqeen and thabaat (firmness).
 Narrated in Sahih Muslim (hadeeth below). Story also mentioned in ‘Al-Bidaayah’ by Ibn Katheer.
الحديث الوارد في صحيح مسلم من طريق عبد الرزاق عن معمر ابن همام عن أبي هريرة عن النبي صلى الله عليه وسلم قال غزا نبى من الأنبياء فدنا من القرية حين صلى العصر أو قريبا من ذلك فقال للشمس أنت مأمورة وأنا مأمور اللهم امسكها علي شيئا فحبست عليهحتى فتح الله علي
 Majma’ Az-Zawaa’id [9/350]
 Abu Nu’aym in “Ad-Dalaa’il”, and also from Ibn Katheer’s “Al-Bidaayah”. Sound chain, Al-Albani commented on it in As-Saheehah
[Courtesy of Islamicawakening.com]