Musnad Ahmad 5:373

Hajjaj narrated to us, Laith narrated to us, Sa’id—meaning al-Maqburi—narrated to us, from ‘Amr ibn Sulaym al-Zuraqi, from ‘Asim ibn ‘Amr, from ‘Ali ibn Abi Talib, that he said: We went out with the Messenger of Allah (peace and blessings of Allah be upon him) until, when we were at al-Harrah at al-Suqya, which belonged to Sa’d ibn Abi Waqqas, the Messenger of Allah (peace and blessings of Allah be upon him) said: "Bring me water for ablution." When he had performed ablution, he stood up and faced the Qiblah, then he said the Takbir, then he said: "O Allah, Ibrahim was Your servant and Your close friend (Khalil), and he prayed for the people of Makkah for blessing. And I am Muhammad, Your servant and Your Messenger; I pray to You for the people of Madinah that You bless them in their mudd and their sa’, twice as much as You blessed the people of Makkah, along with the blessing, two blessings."