Mustadrak al-Hakim — Hadith 3339

It is narrated from Abu Sa'id, the freed slave of Abu Usayd al-Ansari; he said: Sayyiduna Uthman bin Affan (may Allah be pleased with him) heard that a delegation of the people of Egypt was approaching, so he went out to meet them. When they heard of him, they advanced towards him. The narrator said: Sayyiduna Uthman (may Allah be pleased with him) disliked that they should enter Madinah. So when they reached him, they said: "Call for the Mushaf and open 'the seventh' (surah)" (they used to call Surah Yunus 'the seventh'). So he recited it until he reached this verse: "Say: Have you considered what Allah has sent down to you of provision, and you have made some of it unlawful and some lawful? Say: Has Allah permitted you, or do you invent lies about Allah?" [Surah Yunus: 59]. At this they said: "Stop! Tell us about the pastures you have reserved: has Allah permitted you this, or are you inventing lies about Allah?" He (may Allah be pleased with him) said: "Read on. This verse was revealed concerning such-and-such a matter. As for the pastures, Sayyiduna Umar (may Allah be pleased with him) reserved pastures before me for the camels of charity. Then when I became caliph and the camels of charity increased in number, I enlarged the pasture because of the increase in the charity."
This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.