موطا امام مالك رواية ابن القاسم
Muwatta Imam Malik (Riwayat Ibn al-Qasim)
Issues of Marriage
Prohibition of proposing over another's proposal
Hadith 357
229- وبه: أن رسول الله صلى الله عليه وسلم قال: ”لا يخطب أحدكم على خطبة أخيه.“
And with the same chain of narration (it is narrated from Sayyiduna Ibn Umar, may Allah be pleased with them both) that the Messenger of Allah, peace and blessings be upon him, said: "No person should propose marriage over the proposal of his brother."
