Musannaf Ibn Abi Shayba 3:5957

Hafs narrated to us, from Layth, from Shahr, who said: The city (Medina) was shaken by an earthquake during the time of the Prophet, may Allah bless him and grant him peace. He said: "Indeed, your Lord is asking you to seek His pleasure (or: asking you to repent), so seek His pleasure (or: repent to Him)."