Musannaf Ibn Abi Shayba 3:3911

Waki’ narrated to us, he said: Hasan bin Salih narrated to us, from ‘Abd al-‘Aziz bin Rufay’, he said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Hasten the daytime prayer on a cloudy day, and delay the Maghrib."