Swearing to forego marital relations with one’s wife

It was narrated that 'Aishah said:
"The Messenger of Allah ﷺ swore that he would not enter upon his wives for a month, and he stayed for twenty-nine days until, on the eve of the thirtieth, he entered upon me. I said: 'You swore not to enter upon us for a month.' He said: 'The month may be like this,' and he held up his (ten) fingers three times; 'or the month may be like this,' and he held up his fingers three times, keeping one finger down on the third time."

حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ أَبِي الرِّجَالِ، عَنْ أَبِيهِ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، قَالَتْ أَقْسَمَ رَسُولُ اللَّهِ ﷺ أَنْ لاَ يَدْخُلَ عَلَى نِسَائِهِ شَهْرًا فَمَكَثَ تِسْعَةً وَعِشْرِينَ يَوْمًا حَتَّى إِذَا كَانَ مَسَاءَ ثَلاَثِينَ دَخَلَ عَلَىَّ فَقُلْتُ إِنَّكَ أَقْسَمْتَ أَنْ لاَ تَدْخُلَ عَلَيْنَا شَهْرًا . فَقَالَ " شَهْرٌ هَكَذَا " . يُرْسِلُ أَصَابِعَهُ فِيهَا ثَلاَثَ مَرَّاتٍ " وَشَهْرٌ هَكَذَا " . وَأَرْسَلَ أَصَابِعَهُ كُلَّهَا وَأَمْسَكَ إِصْبَعًا وَاحِدًا فِي الثَّالِثَةِ .

It was narrated from Aishah that:
the Messenger of Allah ﷺ swore to keep away from his wives, because Zainab had sent back her gift and 'Aishah said: "She has disgraced you." He became angry and swore to keep away from them.

حَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ، حَدَّثَنَا يَحْيَى بْنُ زَكَرِيَّا بْنِ أَبِي زَائِدَةَ، عَنْ حَارِثَةَ بْنِ مُحَمَّدٍ، عَنْ عَمْرَةَ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ ﷺ إِنَّمَا آلَى لأَنَّ زَيْنَبَ رَدَّتْ عَلَيْهِ هَدِيَّتَهُ . فَقَالَتْ عَائِشَةُ لَقَدْ أَقْمَأَتْكَ . فَغَضِبَ ﷺ فَآلَى مِنْهُنَّ .