Musnad Abu Ya'la al-Mawsili 6:146

Suwayd ibn Sa'id narrated to us, from Malik, from Ibn Shihab, from 'Amir ibn Sa'd ibn Abi Waqqas, from his father, who said: The Messenger of Allah (may Allah bless him and grant him peace) came to visit me during the year of the Farewell Pilgrimage due to an illness that had become severe for me. I said: "O Messenger of Allah, the illness has reached the point you see, and I am a man of wealth, and no one inherits from me except a daughter of mine. Shall I give two-thirds of my wealth as charity?" He said: "No." I said: "Then half of it?" He said: "No." Then he said: "The third, and the third is large—or much. That you leave your heirs wealthy is better for you than that you leave them dependent, begging from people. And you will not spend any expenditure seeking by it the Face of Allah, except that you will be rewarded for it, even for what you place in the mouth of your wife." I said: "O Messenger of Allah, will I be left behind after my companions?" He said: "You will not be left behind, so you perform a righteous deed seeking by it the Face of Allah, except that you will increase in degree and elevation because of it. And perhaps you will be left behind until people benefit by you and others are harmed by you. O Allah, complete for my companions their migration, and do not turn them back on their heels. But the miserable one is Sa'd ibn Khawlah." The Messenger of Allah (may Allah bless him and grant him peace) lamented for him because he died in Makkah.