What is the prayer that Prophet Muhammad (saw) used to recite in the last Rak’a of the `Isha’ prayer?
 Narrated 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."