Musnad Ahmad 32:204

Yahya ibn Sa'id narrated to us, from Humayd, from Anas, who said: When "You will not attain righteousness until you spend from that which you love" [Al-Imran: 92] and "Who is it that would loan Allah a goodly loan?" [Al-Baqarah: 245] were revealed, Abu Talha said: "O Messenger of Allah, my garden is in such and such a place, and by Allah, if I were able to keep it secret, I would not have made it public." He said: "Place it among the poor of your family."