Sahih Muslim 3461
صحيح مسلم#3461SahihAbu Huraira (Allah be pleased with him) reported Allah's Messenger (ﷺ) as saying:The Muslim should not purchase in opposition to his brother, and he should not make the proposal of marriage on the proposal already made by his brother
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 16:64