What is the ruling on the prayer of one who vomited during it, and is it obligatory to repeat it?

If the question refers to vomiting during the 'Isha prayer and interrupting it, then completing it, this prayer is invalid due to the impurity of the vomit and the interruption of the prayer. Similarly, the Fajr prayer is invalid for the same reason. Both the 'Isha and Fajr prayers must be repeated after purifying the clothes or body from the impurity. Purification is achieved by washing the contaminated area until the water that separates from it is pure and unchanged. It is recommended to perform ablution after vomiting.