Ata' bin Abi Rabah عطاء بن أبي رباح · The Book on Marriage

The Messenger of Allah said: "When someone whose religion and character you are pleased with proposes to (someone under the care) of one of you, then marry to him. If you do not do so, then there will be turmoil (Fitnah) in the land and abounding discord (Fasad)."

The Messenger of Allah said: "A man is not to sell over his brother's sale, nor is he to propose to whom his brother has proposed."