The Book of Oaths and Vows
35/25. Chapter:
A Vow Does Not Bring Anything Forward Nor Put It Back
Sunan an-Nasai
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ مَنْصُورٍ، عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " النَّذْرُ لاَ يُقَدِّمُ شَيْئًا وَلاَ يُؤَخِّرُهُ إِنَّمَا هُوَ شَىْءٌ يُسْتَخْرَجُ بِهِ مِنَ الشَّحِيحِ " .
It was narrated that Ibn 'Umar said: "The Messenger of Allah said: 'A vow does not bring anything forward or put it back; it is just a means of taking wealth from the miserly.'"
Reference : Sunan an-Nasa'i 3803In-book reference : Book 35, Hadith 43English translation : Vol. 4, Book 35, Hadith 3834