After the religion brought by the Prophet peace be and blessings upon him had been made perfect and complete, Allah sent down the
revelation:
“This day I have perfected your religion, completed my favors upon you, and declared Islam as your Religion”
[Soorah Al‐Maaidah:3]
The Prophet of Allah peace be and blessings upon him had delivered the message truthfully. He had spared no pains. He had not let any
hardship or sacrifice shake him. He had brought up the people who could be trusted to live up to the spiritual heritage of the Prophets of Allah, who could shoulder the heavy responsibility of carrying the banner of Faith and Truth and to guard the message of Allah against
every interpolation and mutation. Allah had even affirmed that they were capable of the obligation laid on them in the Qur'anic verse that says,
“Ye are the best community that hath been raised‐up for mankind, ye enjoin right conduct and forbid indecency; and ye believe in Allah.”
[Soorah Aali‐Imraan 110]
The Qur’an contains Allah’s pure and holy truth, the source of inspiration and conviction to these people, which enjoyed the assurance of Allah from being eclipsed or from undergoing any corruption in its text.
“Verily We reveal the Reminder, and verily We are
its Guardian.”
[Soorah Al‐Hijr 9]
On the other hand, Allah’s help and victory came to invigorate the Prophet peace be and blessings upon him who saw the people entering
the religion of Allah in large numbers. Delegations from Arab tribes followed one after another in rapid succession to pledge their allegiance to him. The lightning speed or the geometric growth, with which Islam gained converts, promised its victory over all religions of the world.
Allah, in Soorah an‐Nasr, makes an allusion to the rapid success of Islam:
“When Allah’s succor and the triumph cometh And You seest mankind entering the religion of Allah in troops. Then hymn the praises of Your Lord, and seek forgiveness of Him. Lo! He is ever ready to show mercy.”
[Soorah An‐Nasr 1‐3]