Is it obligatory to repeat the prayer in which I led the congregation while I was in a state of janabah, knowing that I performed ablution twice before leading the prayer?

The questioner must repent to Allah for committing a great sin by leading people in prayer while in a state of major ritual impurity (janabah), and the distance of the mosque is not an excuse, nor does ablution (wudu') remove major ritual impurity. The mosque's imam also erred by entrusting the imamate to an impious person. Scholars have differed regarding the ruling on the prayer of those led by an imam who is ritually impure and knows it: The Hanbalis consider the prayer of those led to be invalid, while Ibn Uthaymeen chose the validity of the prayer of those led in all cases, except for those among them who knew of the imam's ritual impurity, because they are ignorant and excused by their ignorance.