What is the legal ruling on a husband abandoning his wife, and what are the consequences of her seeking divorce and leaving the marital home, and what is the ruling on maintenance for a five-year-old child in her custody?

The maintenance of a wife who is not disobedient (nashiz) is obligatory upon her husband according to what is customary, and it is not waived from him except upon the expiration of her 'iddah (definition) (waiting period). The maintenance of the child is incumbent upon him as long as the child is in need. A husband abandoning his wife without justification is an injustice that permits her to seek divorce. It is not permissible for the wife to leave her husband's home after a revocable divorce except out of necessity.