Kurayb said: I asked Usamah bin Zayd (may Allah be pleased with them both) what the Prophet (peace and blessings be upon him) did when he returned from Arafah. He said: He returned from Arafah until, when he came near the mountain pass, he turned towards it, dismounted and urinated. I brought him water, and he (peace and blessings be upon him) performed a light ablution. Then I said: Are you (peace and blessings be upon him) not going to pray? He (peace and blessings be upon him) said: "The prayer is ahead of you." Then he mounted until he reached Jam', dismounted and performed ablution for the prayer. Then he offered the Maghrib prayer, three rak'ahs, and the Isha prayer, two rak'ahs, and did not offer any voluntary prayer or the like between them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9489