Arabic text
عن أبي قتادة الأنصاري وابن أبي أوفى رضي الله عنهما مرفوعاً: «سَاقِي القَوْمِ آخِرُهُمْ شُرْبًا».
Translation
Abu Qatādah al-Ansāri and Ibn Abi Awfa (may Allah be pleased with both of them) reported that the Prophet (may Allah's peace and blessings be upon him) said: "One who serves people to drink should be the last to drink."
Explanation
Whoever serves people water, milk, coffee, tea or the like should be the last one to drink.
Source: HadeethEnc.com