In eulogy of Muhammad, the Umayyads, importance of Imam
Nahj al-Balāgha|Volume 1|Book 1|Chapter 105
[لرسول الكريم ] حَتَّى بَعَثَ اللهُ مُحَمَّداً(صلى الله عليه وآله وسلم)، شَهِيداً، وَبَشِيراً، وَنَذِيراً، خَيْرَ الْبَرِيَّةِ طِفْلاً، وَأَنْجَبَهَا كَهْلاً، أَطْهَرَ الْمُطَهَّرِينَ شِيمَةً، وَأَجْوَدَ الْمُسْتَمْطَرِينَ دِيمَةً.
Then Allāh deputed Muḥammad صلى الله عليه وعلى آله وسلم as a witness, giver of good tidings and warner, the best in the universe as a child and the chastest as a grown up man, the purest of the purified in conduct, the most generous of those who are approached for generosity.