Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 5935
Sa'd reported: This verse was revealed in relation to six persons and I and Ibn Mas'ud were amongst them. The polytheists said to him (the Holy Prophet): Do not keep such persons near you. It was upon this that (this verse was revealed):" Drive not away those who call upon their Lord morning and evening desiring only His pleasure" (vi. 52).