ANSWER:

She must take a stand and tell him seriously that she can’t be living with him if he doesn’t pray, not a single prayer.

Kindly refer to the following link(s):

My husband has stopped praying altogether and has bad company. I try to advice him but to no avail. He says he is better than most men as he doesn’t drink and doesn’t have any affairs. I tell him that i appreciate but you need to polish a bit more.There are so many habits of him that bother me a lot and his stubborness makes me bitter. What approach should i take as some advice me to leave him?