It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that a man came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah, so-and-so has a date palm, and I complete the wall of my orchard with it. Order him to give it to me so that I can complete my wall. The Messenger of Allah (peace and blessings be upon him) said: "Give it to him, and in exchange you will have a date palm in Paradise." He refused. Then Abu al-Dahdah went to that man and said: Sell me your date palm in exchange for my orchard. He did so. Then Abu al-Dahdah came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah, I have bought that date palm in exchange for my orchard; give it to that first man, for I have given it to you. The Messenger of Allah (peace and blessings be upon him) said: "How many heavily laden clusters of dates there are for Abu al-Dahdah (in Paradise)!" He (peace and blessings be upon him) repeated this several times. Then Abu al-Dahdah went to his wife and said: O Umm al-Dahdah, come out of the orchard, for I have sold it in exchange for a date palm in Paradise. She said: The sale has profited! - or she said words to that effect.
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 18967