Ephesians 5:32 in the King James Version
This is a great mystery: but I speak concerning Christ and the church.
Context
31 “For this cause a man will leave his father and mother and will be joined to his wife. Then the two will become one flesh.”
32 This mystery is great, but I speak concerning Christ and the assembly.
33 Nevertheless each of you must also love his own wife even as himself; and let the wife see that she respects her husband.