What is mentioned on estimating date palms

It is narrated from al-Sha'bi that the Prophet (peace and blessings be upon him) sent Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him) to Yemen to estimate (the yield of) their date palms.

The narrator said: I asked al-Sha'bi: Should I do it? He said: No.

It is narrated from Abu Bakr bin Hazm that when the Prophet (peace and blessings be upon him) sent an estimator, he would order him not to estimate the date palms that the owner had given to a needy person ('araya).

Abd al-Rahman bin Mas'ud said: Sayyiduna Sahl bin Abi Hathmah (may Allah be pleased with him) came to our gathering and narrated to us a hadith of the Prophet (peace and blessings be upon him), that he (peace and blessings be upon him) said: "When you estimate, then take, and leave a third; if you do not find (it possible to leave) a third, then leave a quarter."

Bushayr bin Yasar said: Sayyiduna Umar (may Allah be pleased with him) sent Sayyiduna Abu Khaythamah (may Allah be pleased with him) to estimate the date palms, and said to him: When you come to the people of a household in their walled orchard, do not estimate (against them) the amount that they eat.

Sayyiduna Jabir (may Allah be pleased with him) said: Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him) estimated the dates of Khaybar, and they came to 40,000 wasq. Jabir stated that when Ibn Rawahah gave the Jews the choice, they took the dates, and 20,000 wasq were due from them.

It is narrated from Makhul that the Prophet (peace and blessings be upon him) said: "Be lenient with people in the estimation, for in wealth there is the 'ariyyah and the wasiyyah." He said: The 'ariyyah is a date palm that a man inherits in another man's orchard, and the wasiyyah is when a man makes a bequest for the poor.

It is narrated from Sa'id bin al-Musayyib that the Prophet (peace and blessings be upon him) ordered Sayyiduna Attab bin Asid (may Allah be pleased with him) to estimate the grapes just as the date palms are estimated. Then its zakah is to be paid in raisins, just as the zakah of date palms is paid in dried dates. This is the practice of the Prophet (peace and blessings be upon him) regarding date palms and grapes.

Ibn Jurayj said: Abd al-Karim and Amr bin Dinar said to me: Date palms and grapes are to be estimated, but grain is not to be estimated.