Musnad Abu Ya'la al-Mawsili 155:47

And with his chain of narration from Abu Hurayrah, reaching the Prophet (may Allah bless him and grant him peace): "Do not practice *najash* (bidding up the price without the intention to buy). Let none of you sell over the sale of his brother, nor propose over the proposal of his brother. Let no man outbid his brother, nor let a city dweller sell for a bedouin. A woman should not ask for the divorce of her sister (in faith) so that she may empty what is in her dish (i.e., take her place), but rather she should marry, for her provision is upon Allah."