And Muhammad ibn al-Muthanna and Ibn Bashshar narrated to us—Ibn al-Muthanna said: Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from al-Hakam, from 'Umarah ibn 'Umayr, from Ibrahim ibn Abi Musa, from Abu Musa, that he used to give legal rulings permitting mut'ah (temporary marriage). A man said to him: "Be gentle with some of your rulings, for you do not know what the Commander of the Faithful has introduced concerning the rites of pilgrimage." Until he met him afterward and asked him. 'Umar said: "I know that the Prophet, peace and blessings be upon him, did it, and so did his companions. But I disliked that they should remain intimate with them (their wives) in the arāk thickets, then set out for the pilgrimage with their heads dripping."