Sa'd bin Abu Waqqas (May Allah be pleased with him) reported:
Six of us were with the Prophet (ﷺ) when the infidels said to him: "Drive these ones away, lest they should begin to venture against us". The six were, myself, Ibn Mas'ud, a man of the Hudhail tribe, Bilal and two other men whose names I don't know. Messenger of Allah (ﷺ) thought what Allah wished him to think, and Allah revealed: "And turn not away those who invoke their Rubb, morning and afternoon seeking His Face." (6:52)[Muslim].
Arabic/English book reference: Book 1, Hadith 260