Ubaydullah al-Muslim al-Qurashi reported his father as saying that he asked-or someone else asked-the Prophet (SAW) about perpetual fasting. So, he said. ‘Indeed, your family membes have i right over yuu”. He also said, Fast dunng Ramadan and that which follows it0 and ever Wednesday and.Thursday. So then you have indeed kept fast perpetually and also broken fist (meaning you will earn reward for fasting throughout).
[Abu Dawud 2432]