عَنْ ثَابِتِ بْنِ ضَحَّاكٍ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ لَيْسَ عَلَى رَجُلٍ نَذْرٌ فِيمَا لَا يَمْلِكُ
It is narrated from Sayyiduna Thabit bin Dhahak (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: A person has no vow upon that which he does not own.