Allah says:

﴿الَّذِينَ يُبَلِّغُونَ رِسَالـتِ اللَّهِ﴾

(Those who convey the Message of Allah) meaning, to His creation, and fulfil that with which they have been entrusted.

﴿وَيَخْشَوْنَهُ﴾

(and fear Him,) means, they fear Him and they do not fear any besides Him, so no threats on the part of anyone can prevent them from conveying the Message of Allah.

﴿وَكَفَى بِاللَّهِ حَسِيباً﴾

(And sufficient is Allah as a Reckoner.) means, sufficient is Allah as a Helper and Supporter. The leader of all people in this regard and in all regards is Muhammad the Messenger of Allah , for he undertook to convey the Message to the people of the east and of the west, to all kinds of the sons of Adam, so Allah caused his word, his religion and his law to prevail over all other religions and laws. The Prophets before him were sent only to their own peoples, but he was sent to all of mankind, Arabs and non-Arabs alike.

﴿قُلْ يَأَيُّهَا النَّاسُ إِنِّى رَسُولُ اللَّهِ إِلَيْكُمْ جَمِيعًا﴾

(Say: "O mankind! Verily, I am sent to you all as the Messenger of Allah'') (7:158). Then his Ummah inherited the task of conveying from him, and the greatest of those who undertook this task after him were his Companions, may Allah be pleased with them, who conveyed from him as he had commanded them, describing all his words, deeds and circumstances, night and day, when he was settled and when he was traveling, in private and in public, may Allah be pleased with them. Thereafter each generation inherited from their predecessors until our own time, so those who are guided, follow their example and their way. We ask Allah, the Most Generous Bestower, to make us among their heirs.