If all the trees in the world be turn into pen

Prophet Muhammad said:

If all the trees in the world be turn into pen; And the sea be turn into ink, and all the jinns Become accountant, and all human Become writers, they will not be able to count the virtues of Ali ibn Abi Talib (a.s)

Ibn Hajar Al-Asqalani

Lisan al-Mizan, vol5,p62