TABARANI 20081: from Ibn Jurayj —
[Machine] It is reported that the Prophet ﷺ swore not to enter upon his wives for a month. But when twenty-nine days had passed, he came to them or went away. It was said to him, "O Prophet of Allah, you swore not to enter upon them for a month." He replied, "Verily, a month consists of twenty-nine days."

الطبراني ٢٠٠٨١: عن ابن جريج —
أَنَّ النَّبِيَّ ﷺ حَلَفَ أَنْ لَا يَدْخُلَ عَلَى بَعْضِ أَهْلِهِ شَهْرًا فَلَمَّا مَضَى تِسْعٌ وَعِشْرُونَ يَوْمًا غَدَا عَلَيْهِنَّ أَوْ رَاحَ فَقِيلَ لَهُ يَا نَبِيَّ اللهِ حَلَفْتَ أَنْ لَا تَدْخُلَ شَهْرًا فَقَالَ «إِنَّ الشَّهْرَ تِسْعٌ وَعِشْرُونَ يَوْمًا»


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Ṭabarānī > Musnad of Women > § [Machine] Umm Salamah, her name is Hind bint Abi Umayyah...
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