33 Again, you have heard that it was said to the ancients, "You shall not forswear yourself, but shall perform your oaths to the Lord."
Matthew 5:33 Cross References - Living_Oracles
Matthew 5:27
27 You have heard that it was said, "You shall not commit adultery."
Matthew 23:16-22
16 Alas for you, blind guides, who say, To swear by the temple binds not, but swear by the gold of the temple is binding.
17 Foolish and blind! which is more sacred, the gold, or the temple that consecrates the gold?
18 and, to swear by the altar, binds not, but to swear by the offering that is upon it is binding.
19 Foolish and blind! which is more sacred, the offering, or the altar that consecrates the offering?
20 Whoever, therefore, swears by the altar, swears by it, and by everything on it.
21 And whoever swears by the temple, swears by it, and by Him who dwells in it;
22 and whoever swears by heaven, swears by the throne of God, and by Him who sits on it.