What is the ruling on a small part of a worshipper's 'awrah becoming uncovered during prayer, knowing about it but not covering it immediately, and is it obligatory to draw attention to that?

In summary, the ruling on the unintentional uncovering of part of the 'awrah during prayer falls into two categories:

1. Extensive or prolonged uncovering: This invalidates the prayer and necessitates its repetition. You are obliged to instruct anyone you see in this situation to repeat their prayer, as this falls under enjoining good. 2. Slight uncovering that is not extensive to the eye: This does not invalidate the prayer, and you are not obliged to object.