Steadfastness comes from Allah, who makes firm the hearts of the believers: this idea runs through these verses. They mention the believers made firm in battle, the Messenger ﷺ strengthened in the face of the disbelievers, the revelation sent down to make firm those who believe, and what consolidates faith in the soul: spending in the way of Allah and bearing the hardship of obedience.
Verses gathered from a topical index of the Quran, in Mushaf order; every verse is quoted in full.
If you do not aid him [i.e., the Prophet (ﷺ)] - Allāh has already aided him when those who disbelieved had driven him out [of Makkah] as one of two, when they were in the cave and he [i.e., Muḥammad (ﷺ)] said to his companion, "Do not grieve; indeed Allāh is with us." And Allāh sent down His tranquility upon him and supported him with soldiers [i.e., angels] you did not see and made the word of those who disbelieved the lowest, while the word of Allāh - that is the highest. And Allāh is Exalted in Might and Wise.
And each [story] We relate to you from the news of the messengers is that by which We make firm your heart. And there has come to you, in this, the truth and an instruction and a reminder for the believers.
And those who disbelieve say, "Why was the Qur’ān not revealed to him all at once?" Thus [it is] that We may strengthen thereby your heart. And We have spaced it distinctly.
