Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that he said: "I entered with the Prophet (peace and blessings be upon him) into the orchard of a tribe of the Ansar, and I offered him (peace and blessings be upon him) a green unripe date (busrah). He (peace and blessings be upon him) ate it and then said: 'O Ibn Umar! This is the first food I have eaten in three days.'"
No one narrated this hadith from Nafi' (may Allah have mercy on him) except al-Wazi' bin Nafi' (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب العين / 4856
Hadith Takhrij«أخرجه عبد بن حميد فى «مسنده» برقم: 816، وابن حجر فى «المطالب العالية» برقم: 3158، والطبراني فى «الأوسط» برقم: 8873»