What is the ruling on prayer when one feels madhy (prostatic fluid) or wady (thick, turbid discharge) coming out after performing wudu? And must it be repeated?

One must not leave the prayer due to doubt about breaking ablution unless there is certain knowledge that something has been discharged, based on the Prophet's (peace be upon him) saying: "He should not leave until he hears a sound or perceives a smell." If doubt occurs after finishing the prayer, the prayer should not be repeated unless the impurity is certain. As for madhy (pre-seminal fluid) and wady (thick white discharge after urination), both are impure and invalidate ablution.