Haram bin Uthman relates from Abd al-Rahman and Muhammad, the sons of Jabir (may Allah be pleased with him), from their father, the same hadith as marfu' (from the Prophet).
And it has been narrated from the Prophet (peace and blessings be upon him) in a mursal hadith: "There is no zakah on the 'araya (palms given as gifts)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7449