In the third verse (40), by citing the event of the Hijrah of the Holy Prophet, it has been stressed that the Rasul of Allah has no need to depend on any human help and support. Allah can help him directly through unseen factors - as it happened at the time of Hijrah when his own people had forced him to leave his homeland. On this journey, the only companion he had was Sayyidna Abu Bakr ؓ the true one. Enemy foot soldiers and riders were looking for them in hot pursuit. The place to hide he had found was no fortified fortress. It was just a cave and the enemy search party had reached close to its edges. Inside it, the companion of the cave, Sayyidna Abu Bakr ؓ was worried, not for his own safety, but about his master. He was in fear lest the enemy outside were to harm the Holy Prophet ﷺ . But, the master himself was sitting calm like a mountain at peace. Not simply that he was himself cool and collected, he was telling his companion, Sayyidna Abu Bakr: ؓ لَا تَحْزَنْ إِنَّ اللَّـهَ مَعَنَا (` la tahzan innallaha ma` ana': Do not grieve. Allah is with us).
What has been said here is composed of a couple of words, easy and effortless as they sound. But, let those listening place the blueprint of conditions prevailing before their eyes, cross their hearts and ask: Can someone dependent on mere material means be that tranquil? Every honest person would say that it was just not possible. The reason for this was no other but that which the Qur'an has given in the next sentence:
So, Allah sent down His tranquility on him and strengthened him with troops you did not see ...
These troops could be troops of angels, and of the elemental forces of the entire universe too - for they are, so to say, a virtual army of Allah. When this happened, the ultimate came to be. The word of disbelievers was rendered low and the word of Allah remained the highest.