Abu Khaythama reported in kitaab al-Ilm with a chain of transmission going back to Abu Khaalid who was a companion of Ibn Mas’ood (radiyallaahu-anhu), who said that one day they were sitting in the masjid and khabbaab (radiyallaahu-anhu) came along and sat, and then he was silent; so the people said to him: ”Verily, your companions have congregated with you in order that you may relate a hadeeth to them or command them with something; so he said: ”And what should I command them? It may be that i command them with something that I myself do not do.”

Imaam Al-Albaanee says that the cahin of this narration is authentic and it was transmitted by Muslim