Musnad Ahmad 32:1823

Abdullah ibn Bakr narrated to us, Humaid narrated to us, from Anas, who said: When this verse was revealed: {You will not attain righteousness until you spend from that which you love} [Al-Imran: 92], or {Who is it that would loan Allah a goodly loan?} [Al-Baqarah: 245], Abu Talha said—and he had a garden—: "O Messenger of Allah, my garden is for Allah. And if I were able to keep it secret, I would not have made it public." He said: "Place it among your relatives," or "your kin."