Musannaf Ibn Abi Shayba 33:1361

Yahya ibn Adam narrated to us, he said: Hammad ibn Salamah narrated to us, he said: Abu Ja’far al-Khatmi narrated to us that his grandfather, Umayr ibn Habib, used to stand at night and say: "Departure, O people! You have been preceded to the water. The night journey, the night journey! Whoever precedes to the water will be thirsty, and whoever precedes to the sun will be exposed to the heat. Departure, departure!"