(20) باب النَّهْىِ أَنْ يَخْطُبَ الرَّجُلُ عَلَى خِطْبَةِ أَخِيهِ .
It was narrated from Abu Hurairah that the Prophet said:
"None of you should propose marriage to a woman when someone else has already proposed to her." (DE)
Reference (DE): Sunan an-Nasa'i 3242 (DE)
In-book reference (DE): Book 26, Hadith 47 (DE)
English translation (DE): Vol. 4, Book 26, Hadith 3244 (DE)