Yahya related to me from Malik that Humayd ibn Qays al-Makki
said, "A man came to the Messenger of Allah, may Allah bless him and
grant him peace, with the two sons of Jafar ibn Abi Talib. He said to
their nursemaid, 'Why do I see them so thin?' Their nursemaid said,
'Messenger of Allah, the evil eye goes quickly to them. Nothing stops
us from asking someone to make incantations (using ayats of Qur'an)
for them, except that we do not know what of that would agree with
you.' The Messenger of ,Allah, may Allah bless him and grant him
peace, said, 'Make incantations for them. Had anything been able to
precede the decree, the evil eye would precede it.' "
Muwatta Malik Book 50, Hadith 3