Sahih Bukhari
Judgments (Ahkaam)
Volume: 009 / Book Number: 089 / Hadith Number: 262
Narrated Abu Huraira:
The Prophet said, "You people will be keen to have the authority of ruling which will be a thing of regret for you on the Day of Resurrection. What an excellent wet nurse it is, yet what a bad weaning one it is!"