وَ رُوِيَ عَنْ جَمِيلِ بْنِ صَالِحٍ قَالَ: كَانَتْ عِنْدِي جَارِيَةٌ بِالْمَدِينَةِ فَارْتَفَعَ طَمْثُهَا فَجَعَلْتُ لِلَّهِ عَزَّ وَ جَلَّ عَلَيَّ نَذْراً إِنْ هِيَ حَاضَتْ فَعَلِمْتُ بَعْدُ أَنَّهَا حَاضَتْ قَبْلَ أَنْ أَجْعَلَ اَلنَّذْرَ عَلَيَّ فَكَتَبْتُ إِلَى أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ وَ أَنَا بِالْمَدِينَةِ فَأَجَابَنِي "إِنْ كَانَتْ حَاضَتْ قَبْلَ اَلنَّذْرِ فَلاَ نَذْرَ عَلَيْكَ وَ إِنْ كَانَتْ حَاضَتْ بَعْدَ اَلنَّذْرِ فَعَلَيْكَ ".
Jamil ibn Salih narrated that he had a female slave in Medina whose menstruation had stopped. He made a vow to Allah (swt), the Almighty and Glorious, that if she began to menstruate, he would fulfill a certain obligation. Later, he learned that she had already menstruated before he made the vow. He wrote to Abu Abdillah (a.s) while he was in Medina, asking for guidance. Abu Abdillah (a.s) replied: "If she had menstruated before the vow, then there is no obligation upon you. However, if she menstruated after the vow, then the vow is binding upon you."