The Messenger of Allah ﷺ said, "A town-dweller must not sell on behalf of a desert-dweller. Do not inflate prices against one another. A man must not bargain over the bargain of his brother, nor propose to a woman already proposed to by his brother. A woman must not ask for the divorce of her sister to empty what is in her bowl. Let her marry, for she will have only what Allah has decreed for her."
حدثنا إسماعيل بن إبراهيم عن معمر عن الزهري عن سعيد بن المسيب
قال رسول الله ﷺ لا يبيعن حاضر لباد ولا تناجشوا ولا يساوم الرجل على سوم أخيه ولا يخطب على خطبة أخيه ولا تسأل المرأة طلاق أختها لتكتفئ ما في إنائها ولتنكح فإنما لها ما كتب الله لها
Sahih. It has already been mentioned many times before with similar wording, and it is likewise found close to this in Bukhari, 9/249, in the book of Sales, chapter on Conditions Not Permitted, and Muslim, 2/1029, no. 1408, in the book of Marriage, chapter on the Prohibition of Combining a Woman with Her Paternal Aunt.