It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah Almighty has given you a third of your wealth at the time of your death, as an increase in your deeds."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوصايا / 12571