Narrator:Abdullāh ibn ‘Umar
وعن ابن عمر رضي الله عنهما، أن رسول الله صلى الله عليه وسلم قال:
"لا يبع بعضكم على بيع بعض، ولا يخطب على خطبة أخيه إلا أن يأذن له"
Ibn 'Umar (May Allah be pleased with them) said:
The Messenger of Allah (ﷺ) said, "A person should not enter into a transaction when his (Muslim) brother has already negotiated, nor should he make a proposal of marriage when that of his brother is pending, except with the permission of the latter."
[Al-Bukhari and Muslim]
Reported by Al-Bukhari (No. 2139, 2165, 5142), Muslim (No. 1412a, 1412e), Abu Dawud (No. 3436), At-Tirmidhi (No. 1292), An-Nasa’i (No. 3243), Ibn Majah (No. 1868, 2171), Malik (No. 1382), Ahmad (No. 4302, 5052, 5394, 5597, 5761, 5763, 5787, 5861) and Ad-Darimi (No. 2454). Cited in Riyad as-Salihin (No. 1779).