'Abd Allah b. 'Umar reported the Messenger of Allah ﷺ as saying:
I did not see more defective in respect of reason and religion than the wise of you (women). A woman asked: What is the defect of reason and religion ? He replied: The defect of reason is the testimony of two women for one man, and the defect of faith is that one of you does not fast during Ramadan (when one is menstruating), and keep away from prayer for some days.

حَدَّثَنَا أَحْمَدُ بْنُ عَمْرِو بْنِ السَّرْحِ، حَدَّثَنَا ابْنُ وَهْبٍ، عَنْ بَكْرِ بْنِ مُضَرَ، عَنِ ابْنِ الْهَادِ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ " مَا رَأَيْتُ مِنْ نَاقِصَاتِ عَقْلٍ وَلاَ دِينٍ أَغْلَبَ لِذِي لُبٍّ مِنْكُنَّ " . قَالَتْ وَمَا نُقْصَانُ الْعَقْلِ وَالدِّينِ قَالَ " أَمَّا نُقْصَانُ الْعَقْلِ فَشَهَادَةُ امْرَأَتَيْنِ شَهَادَةُ رَجُلٍ وَأَمَّا نُقْصَانُ الدِّينِ فَإِنَّ إِحْدَاكُنَّ تُفْطِرُ رَمَضَانَ وَتُقِيمُ أَيَّامًا لاَ تُصَلِّي " .