If one leaves the fasting of the three days until the end of the days of Tashreeq without an excuse, does he commit a sin?

Question : And regarding the one who leaves, for example, fasting three days, for example, without an excuse until the days of the mosque ended, do we tell him: Fast, and you will be sinful after that, or is it otherwise?

Answer : No, he is sinful for the delay, without doubt. Based on the principle, if one leaves something time-bound for you without an excuse until its time has passed, it is not accepted from him. We tell him: Even if you fast, it will not be accepted from you.