Sahih Bukhari Volume 008, Book 075, Hadith Number 402.

Narated By Abu Huraira : When the Prophet said, "Sami' al-lahu Liman hamidah (Allah heard him who sent his praises to Him)" in the last Rak'a of the 'Isha' prayer, he used to invoke Allah, saying, "O Allah! Save 'Aiyash bin Abi Rabi'a; O Allah! Save Al-Walid bin Al-Walid; O Allah! Save the weak people among the believers; O Allah! Be hard on the Tribe of Mudar; O Allah! Inflict years of drought upon them like the years (of drought) of the Prophet Joseph."