[Hope]

Sahih Bukhari, 2468:

... The Prophet (ﷺ) did not go to his wives because of the secret which Hafsa had disclosed to `Aisha, and he said that he would not go to his wives for one month as he was angry with them when Allah admonished him (for his oath that he would not approach Maria). When twenty-nine days had passed, the Prophet (ﷺ) went to Aisha first of all. She said to him, 'You took an oath that you would not come to us for one month, and today only twenty-nine days have passed, as I have been counting them day by day.' The Prophet (ﷺ) said, 'The month is also of twenty-nine days.' That month consisted of twenty-nine days ... 

This traditions is also narrated in  Sahih Muslim 1479e,

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