Abdullah bin Abi Awfa (may Allah be pleased with him) said: The Prophet (peace and blessings be upon him) was on a journey, and the people became thirsty, so he (peace and blessings be upon him) halted at a place. The Companions of the Prophet (peace and blessings be upon him) (may Allah be pleased with them) were saying: O Messenger of Allah (peace and blessings be upon him), drink! He (peace and blessings be upon him) said: "The one who gives the people to drink drinks last of all."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14669
Sayyiduna Abdullah bin Abi Awfa (may Allah be pleased with him) said: We were with the Messenger of Allah (peace and blessings be upon him) when the Companions (may Allah be pleased with them) became thirsty, and the Messenger of Allah (peace and blessings be upon him) was giving them water to drink. It was said: Will you (peace and blessings be upon him) not drink? He (peace and blessings be upon him) said: "The one who gives the people to drink drinks last of all."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14670