Musannaf Ibn Abi Shayba 3:2506

Waki’ narrated to us, from Usama bin Zayd, from Mu’adh bin Abdullah bin Habib, from Jabir: "When we arrived with the Messenger of Allah (may Allah bless him and grant him peace), he said to me, 'O Jabir, have you prayed?' I said, 'No.' He said, 'Then pray two rak'ahs.'"