Matthew 5:33; Matthew 14:7; Matthew 14:9; Matthew 26:72
"Again, you have heard that the ancients were told, 'YOU SHALL NOT MAKE FALSE VOWS, BUT SHALL FULFILL YOUR VOWS TO THE LORD .'
so much that he promised with an oath to give her whatever she asked.
Although he was grieved, the king commanded it to be given because of his oaths, and because of his dinner guests.
And again he denied it with an oath, "I do not know the man."