It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to send a man of the Ansar from Banu Bayadah, called Farwah bin Amr, and he would estimate the fruit of the people of Madinah.
Hadith Referenceالمعجم الكبير للطبراني / باب الفاء / 15932