Surah 110. An-Nasr, Ayah 3

Implying that even if people should embrace the true religion in great numbers, a believer ought not to grow self-complacent but should, rather, become more humble and more conscious of his own failings. Moreover, the Prophet is reported to have said, "Behold, people have entered God's religion in hosts - and in time they will leave it in hosts" (Ibn Hanbal, on the authority of Jabir ibn 'Abd Allah; a similar Tradition, on the authority of Abu Hurayrah, is found in the Mustadrak).

Every man should humble himself before Allah, confess his human frailties, and seek Allah's grace;-attributing any success that he gets in his work, not to his own merits, but to the goodness and mercy of Allah. But the Prophet of Allah had also another duty and privilege,-to pray for grace and forgiveness for his people in case any of them had exulted in their victory or done anything that they should not have done.