712 – From Abū Saʿīd al-Khudrī and Abū Hurayrah (may Allah be pleased with them both):
“The Messenger of Allah ﷺ appointed a man over Khaybar. The man came to him with some janīb dates (a choice variety). The Messenger of Allah ﷺ asked, ‘Are all the dates of Khaybar like this?’ He replied, ‘No, by Allah, O Messenger of Allah! We buy one sāʻ of this for two—and sometimes three—sāʻs (of ordinary dates).’ The Messenger of Allah ﷺ said, ‘Do not do that. Sell the mixed dates for dirhams, then with the dirhams buy janīb. The same principle applies to transactions conducted by weight.’ Agreed upon.

Muslim adds: ‘And the same applies to weighing.’ (1)

Glossary of the ḥadīth
• “Appointed a man” (istamala rajulan): meaning he made him a collector. The man was Suwād ibn Ghaziyyah al-Anṣārī—Suwād is spelled with an un-dotted sīn and a single wāw; Ghaziyyah rhymes with ʿAṭiyyah.
• Khaybar: a town about 165 km north of Madīnah on the road toward Jordan, an agricultural area rich in palm groves.
• janīb: the finest type of dates, plural janb. Al-Khaṭṭābī said, “It is their choicest dates.”
• “For two—and sometimes three—sāʻs”: in some narrations it reads “for three” without the tāʾ marbūṭah; both are acceptable because the word sāʻ can be treated as masculine or feminine. A sāʻ is a dry measure used for grains and dried fruits.