Musnad Ahmad 26:258

'Abd al-Razzaq narrated to us, Sufyan informed us, from al-A'mash, from Ibrahim, from 'Alqama, from 'Abdullah, who said: We were with the Prophet, may Allah bless him and grant him peace, on a journey, and they could not find water. A vessel of water was brought to him, and the Prophet, may Allah bless him and grant him peace, placed his hand in it and spread his fingers. He said: I saw the water gushing out from between the fingers of the Prophet, may Allah bless him and grant him peace. [Then he said]: "Come to the ablution, and the blessing is from Allah." Al-A'mash said: Salim ibn Abi al-Ja'd informed me, saying: I said to Jabir ibn 'Abdullah: How many people were there that day? He said: We were one thousand five hundred.