Bible Verses About Swearing Falsely: Shimei

Shlomo was told that Shim'i had gone from Yerushalayim to Gat and back.

The king summoned Shim'i and said to him, "Didn't I have you swear by ADONAI and forewarn you by telling you, 'Know for a fact that on the day you leave and go anywhere outside the city, you will certainly die'? and you answered me, 'What you're saying is good; I hear it.'

Why, then, haven't you kept the oath of ADONAI and the mitzvah I charged you with?"