The Prophet (ﷺ) said: One of you must not ask a woman in marriage when his brother has done so already, and one of you must not sell (his own goods) when his brother has already sold (his goods) except with his permission.
Sunan Abi Dawud Book 12, Hadith 36
← Previous Hadith Abu Hurairah reported the Apostle of Allaah(ﷺ) as saying “ A man should not seek the hand of a woman in marriage when his brother has already sought her hand.”

Sunan Abi Dawud Book 12, Hadith 35 Next Hadith → The Prophet (ﷺ) said: When one of you asked a woman in marriage, if he is able to look at what will induce him to marry her, he should do so. He (Jabir) said: I asked a girl in marriage, I used to look at her secretly, until I looked at what induced me to marry her. I, therefore, married her.

Sunan Abi Dawud Book 12, Hadith 37