Majma al-Zawaid — Hadith 6364

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) relates this saying of the Prophet (peace and blessings be upon him): "A town-dweller shall not sell for a desert-dweller; do not go out to meet the traders (before they reach the market); do not bid falsely against one another; let none of you propose marriage over his brother's proposal; and let no woman ask for the divorce of her sister in order to take for herself what is in her bowl, for she will get only what has been decreed for her. Do not leave the milk unmilked (tasriyah) in she-camels or goats in order to sell them. Whoever buys a musarrah goat has a choice of two options (either he keeps it, or) if he wishes, he returns it, and returns a sa' of dates along with it." (Al-Haythami says:) I say: In the "Sahih" there is a hadith from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) forbidding false bidding and going out to meet (traders outside the market). Abu Dawud and Ibn Majah also recorded from him a hadith about the musarrah animal, except that in it he said: "He returns twice (the narrator is unsure; perhaps the words are:) the equivalent of its milk in wheat," that is, he used the word wheat instead of dates.
Al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains a narrator, Layth bin Abi Sulaym, and he is thiqah (trustworthy) but he is a mudallis (one who conceals defects in the chain). The rest of its narrators are the narrators of the Sahih.