If one amongst us had to break fasts (of Ramadan due to natural reasons, i. e. menses) during the life of the Messenger of Allah ﷺ she could not find it possible to complete them so long she had been in the presence of Messenger of Allah ﷺ till Sha'ban commenced.
أَنَّهَا قَالَتْ إِنْ كَانَتْ إِحْدَانَا لَتُفْطِرُ فِي زَمَانِ رَسُولِ اللَّهِ ﷺ فَمَا تَقْدِرُ عَلَى أَنْ تَقْضِيَهُ مَعَ رَسُولِ اللَّهِ ﷺ حَتَّى يَأْتِيَ شَعْبَانُ
If one amongst us had to break fasts (of Ramadan due to natural reasons, i. e. menses) during the life of the Messenger of Allah ﷺ she could not find it possible to complete them so long she had been in the presence of Messenger of Allah ﷺ till Sha'ban commenced. (Using translation from Muslim 1146e)
أَنَّهَا قَالَتْ «إِنْ كَانَتْ إِحْدَانَا لَتُفْطِرُ فِي زَمَانِ رَسُولِ اللَّهِ ﷺ فَلَمْ تَقْدِرْ أَنْ تَقْضِيَهُ مَعَ النَّبِيِّ ﷺ حَتَّى يَأْتِيَ شَعْبَانُ مَا كَانَ النَّبِيُّ ﷺ يَصُومُ فِي شَهْرٍ مَا كَانَ يَصُومُهُ فِي شَعْبَانَ كَانَ يَصُومُهُ إِلَّا قَلِيلًا بَلْ كَانَ يَصُومُهُ كُلَّهُ»
"One of us (women) would miss some fasts in Ramadan and she would not be able to make it up until Shaban began, and the Messenger of Allah did not fast in any month as he fasted in Shaban; he used to fast all of it, except a little, he used to fast all of it." ' (Using translation from Nasāʾī 2178)
إِنْ كَانَتْ إِحْدَانَا لَتُفْطِرُ فِي زَمَانِ رَسُولِ اللهِ ﷺ فَمَا تَقْدِرُ عَلَى أَنْ تَقْضِيَهُ مَعَ رَسُولِ اللهِ ﷺ حَتَّى يَأْتِيَ شَعْبَانُ مَا كَانَ رَسُولُ اللهِ ﷺ يَصُومُ مِنْ شَهْرٍ مَا كَانَ يَصُومُ مِنْ شَعْبَانَ كَانَ يَصُومُهُ كُلَّهُ إِلَّا قَلِيلًا بَلْ كَانَ يَصُومُهُ كُلَّهُ