Sahih al-Bukhari 6608
Sahih al-Bukhari · Book 82: Divine Will (Al-Qadar) · Man makes a vow seeking something other than what has been preordained
Narrated Ibn `Umar:
حَدَّثَنَا أَبُو نُعَيْمٍ ، حَدَّثَنَا سُفْيَانُ ، عَنْ مَنْصُورٍ ، عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ نَهَى النَّبِيُّ صلى الله عليه وسلم عَنِ النَّذْرِ قَالَ " إِنَّهُ لاَ يَرُدُّ شَيْئًا، وَإِنَّمَا يُسْتَخْرَجُ بِهِ مِنَ الْبَخِيلِ " .
The Prophet (ﷺ) forbade vowing and said, "In fact, vowing does not prevent anything, but it makes a miser to spend his property."