Narrated Ibn 'Umar:

It was narrated from Ibn 'Umar that the Prophet ﷺ said: "None of you should propose marriage to a woman when someone else has already proposed to her."

أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ﷺ قَالَ " لاَ يَخْطُبْ أَحَدُكُمْ عَلَى خِطْبَةِ بَعْضٍ " .