What is the ruling on a father who neglects his daughter and does not ask about her for three weeks without an excuse?

If the question is about a father's relationship with his daughter, then maintaining kinship ties (silat al-rahim) is obligatory, and there is no specific limit to it prescribed by Sharia (definition). It varies according to circumstances, individuals, and customs. The daughter must maintain ties with her father even if he severs them, for the father's right is great. However, if the question is about a father's obligations towards his daughter for whom he is responsible for financial support, then he must provide for her as long as she is in need. He should also visit her regularly and inquire about her well-being.