Abd al-Rahman bin Uwaym (may Allah have mercy on him) said: Companions of the Messenger of Allah (peace and blessings be upon him) (may Allah be pleased with them) told me that when the Messenger of Allah (peace and blessings be upon him) set out for the Hijrah, Sayyiduna Ali (may Allah be pleased with him) stayed behind for three days and nights, until he returned the trusts of the people that had been with the Messenger of Allah (peace and blessings be upon him); when he had finished, he joined the Messenger of Allah (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوديعة / 12697