The Prophet ﷺ said: There is no divorce except in what you possess; there is no possession, there is no sale transaction till you possess. The narrator Ibn as-Sabbah added: There is no fulfilling a vow till you possess.  

أَنَّ النَّبِيَّ ﷺ قَالَ لاَ طَلاَقَ إِلاَّ فِيمَا تَمْلِكُ وَلاَ عِتْقَ إِلاَّ فِيمَا تَمْلِكُ وَلاَ بَيْعَ إِلاَّ فِيمَا تَمْلِكُ زَادَ ابْنُ الصَّبَّاحِ وَلاَ وَفَاءَ نَذْرٍ إِلاَّ فِيمَا تَمْلِكُ  

The above tradition has also been transmitted by ‘Amr bin Shu’aib through a different chain of narrators to the same effect. This version adds “If anyone swears an oath to do an act of disobedience to GOD, his oath is not valid, and if anyone swears an oath to sever relationship, his oath is not valid(i.e., he must not fulfill it)  

عَنْ عَمْرِو بْنِ شُعَيْبٍ بِإِسْنَادِهِ وَمَعْنَاهُ زَادَ مَنْ حَلَفَ عَلَى مَعْصِيَةٍ فَلاَ يَمِينَ لَهُ وَمَنْ حَلَفَ عَلَى قَطِيعَةِ رَحِمٍ فَلاَ يَمِينَ لَهُ  

The above tradition has also been transmitted by ‘Amr bin Shu’aib through a different chain of narrators. This version adds The Prophet ﷺ said “There is no vow except in an act which seeks the pleasure of Allah, the Exalted.  

أَنَّ النَّبِيَّ ﷺ قَالَ فِي هَذَا الْخَبَرِ زَادَ وَلاَ نَذْرَ إِلاَّ فِيمَا ابْتُغِيَ بِهِ وَجْهُ اللَّهِ تَعَالَى ذِكْرُهُ