[As] a Mercy from your Lord. Verily He is the All-Hearer, the All-Knower.
He it is Who sent down calmness and tranquillity into the hearts of the believers that they may grow more in Faith along with their [present] Faith. And to Allah [swt] belong the hosts of the heavens and the earth and Allah [swt] is Ever All-Knower, All-Wise.
When those who disbelieve had put in their hearts pride and haughtiness – the pride and haughtiness of the time of ignorance – then Allah [swt] sent down his calmness and tranquillity upon His Messenger and upon the believers and made them stick to the word of piety; and they were well entitled to it and worthy of it. And Allah [swt] is the All-Knower of everything.
O you who believe! Make not [a decision] in advance before Allah [swt] and His Messenger and fear Allah [swt]. Verily Allah [swt] is All-Hearing, All-Knowing.
[This is] a Grace from Allah [swt] and His Favour. And Allah [swt] is All-Knowing, All-Wise.