Qurrah narrates: Whenever the Prophet (peace and blessings be upon him) sat down, his Companions would sit around him in circles.
Al-Bazzar recorded it; its chain contains Sa'id bin Sallam, whom Imam Ahmad declared a liar.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 553