It is narrated from Sayyiduna Abu Rafi' (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) set out early in the morning for Banu Qurayzah riding a saddleless donkey named Ya'fur.
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Abu Rafi' (may Allah be pleased with him) only with this chain; Ibrahim bin al-Mundhir is alone in narrating it."