Sayyiduna Abdullah bin Zayd (may Allah be pleased with him), who was shown the call to prayer (adhan) in a dream, came to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah! This garden of mine is charity; it is for Allah and His Messenger (peace and blessings be upon him). Then his parents came and said: O Messenger of Allah! It was the means of our livelihood. So he (peace and blessings be upon him) returned it to them. Then they both died, and after that their son inherited from them.
This is mursal; Abu Bakr bin Hazm did not meet Abdullah bin Zayd. It has also been narrated through other routes from Abdullah bin Zayd, all of them mursal. The hadith concerns a charity that is not perpetual; it is as if he gave it as a voluntary charity and left its disbursement to the choice of the Messenger of Allah (peace and blessings be upon him), and the Messenger of Allah (peace and blessings be upon him) gave it in charity to his parents.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوقف / 11913