What is the ruling regarding your leading your relative, who suffers from obsessive-compulsive disorder (OCD), urinary incontinence, and gas, in prayer? What is the easiest way for her to perform ablution (wudu)? And is it sufficient for her to follow the imam in the opening takbeer (takbeerat al-ihram) without uttering it?

Obsessive-compulsive disorder (OCD) is an illness that requires medical treatment. The person afflicted by it should disregard these thoughts and know that their purification (taharah) and prayer (salat) are valid from the very first time they perform them. It would ease her condition if she prays in congregation. She must perform the opening takbir (takbirat al-ihram). Someone assisting her can instruct her to say the takbir and inform her when she has completed it. They can train her on this and help her with purification. A sufficient ghusl (ritual bath) involves circulating water over the entire body along with rinsing the mouth and nose. For wudu (ablution), it is permissible to wash the limbs once, twice, or thrice, and to wipe the head once.