Musannaf Ibn Abi Shaybah

Hazrat Ibn Jurayj says that I asked Hazrat Ata when should the estimation of dates be made? He replied: When they become fit to eat and begin to be eaten.

It is narrated from Hazrat Abdullah bin Fulan that the Noble Prophet (peace and blessings be upon him) instructed the estimator in Khaybar to estimate when their dates become ripe and good. Hazrat Ibn Shihab states that the Noble Prophet (peace and blessings be upon him) ordered that estimation be done for the people of Khaybar when their first dates ripen.