The Messenger of Allah (ﷺ) as saying: If anyone buys grain, he must not sell it till receives it in full.
Sunan Abi Dawud Book 24, Hadith 77
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Sunan Abi Dawud Book 24, Hadith 76 Next Hadith → During the time of Messenger of Allah (ﷺ) we used to buy grain, and he sent a man to us who ordered us to move it from the spot where we had bought it to some other place, before we sold it without weighing or measuring it.

Sunan Abi Dawud Book 24, Hadith 78