The Prophet ﷺ said, "The one who serves drink to a group is the last of them to drink."
حدثنا مسلم بن إبراهيم حدثنا شعبة عن أبي المختار
أن النبي ﷺ قال ساقي القوم آخرهم شربا
[Sahih] Ahmad narrated it, 4/354, from the hadith of Shubah, through this route. It has corroborating narrations in Muslim, no. 681, and Tirmidhi, no. 1894, and others.