Is it obligatory to repeat the ‘Isha and Tarawih prayers if one is unsure about the discharge of secretions during the prayer after being certain of purity beforehand?

"You are not required to perform ablution unless you are certain that something has been discharged. Any moisture or fluids you find after the prayer are to be considered as having exited after the prayer, unless you are certain that they were discharged during the prayer. This is because an impurity (hadath) is attributed to the most recent time it could have possibly occurred. Therefore, you do not need to repeat your prayer."