Musannaf Ibn Abi Shayba 3:4434

Isma'il ibn Ibrahim narrated to us, from Ibn 'Awn, from Ibn Sirin, who said: Ibn Mas'ud and Hudhayfah spent the night talking at the place of al-Walid ibn 'Uqbah. Then they went out and pretended to be asleep. When they reached the morning, each one of them performed one rak'ah.