Zakaria bin Abi Za'idah زكريا بن أبي زائدة خالد · The Chapters on Marriage

“The Messenger of Allah said: “Whatever is given as a dowry or gift before the marriage, it belongs to her. Whatever is given after the marriage belongs to the one to whom it was given. And the most deserving matter for which a man is honored is (the marriage of) his daughter or sister.”