Is there a way to guide a father who does not pray, nor fast, and drinks alcohol, and insults the Divine Being, and quarrels with his wife in front of their daughter, and how should a mother act who leaves her daughter with him due to work circumstances?

If the father curses religion, he is an apostate from Islam, and abandoning prayer and fasting and drinking alcohol are grave sins. The greatest kindness one can show him is to strive for his guidance through supplication and by seeking help from scholars and close relatives. As for the daughter, it is better for her to stay at home and be cared for, if the mother does not need to work, because children are affected by what they see and hear. If the mother needs to work, then the daughter should be placed in a righteous environment, because a child is a trust, and their pure heart is affected by what it is inclined towards. If accustomed to good, they will be happy; if accustomed to evil, they will be wretched. It is not advisable to leave the daughter in the father's house if he is in the state of cursing religion; instead, a righteous and trustworthy guardian should be sought for her.