Abu Ja'far al-Nafaili عبد الله بن محمد أبو جعفر النفيلي الحران · Fasting (Kitab Al-Siyam)

The Messenger of Allah (ﷺ) said: Neither vomiting, nor emission, nor cupping breaks the fast of the one who is fasting.

Hamzat al-Aslami asked the Prophet (ﷺ): Messenger of Allah, I am a man who keeps perpetual fast, may I fast while on a journey? He replied: Fast if you like, or break your fast if you like.

I asked or someone asked the Prophet (ﷺ) about perpetual fasting. He replied: You have a duty to your family. Fast during Ramadan and the following month, and every Wednesday and Thursday. You will then have observed a perpetual fast.

The tradition mentioned above has also been transmitted by Al Zuhri through a different chain of narrators. In this version she said “When he was at the gate of the mosque which was near the gate of Umm Salamah, two men passed them. The narrator then transmitted the tradition to the same effect.