'Sinned' in the Bible

So Saul died on account of his sin which he had sinned against Yahweh concerning the command of Yahweh that he did not keep. He also consulted a medium to seek [guidance].

Then David said to God, "I have sinned severely [in] that I have done this thing. But now, please forgive the sin of your servant, for I have been very foolish."

Then David said to God, "Was it not I [who] gave a command to count the people? Now I [am] he who has sinned, and I have certainly done wickedness, but these sheep, what have they done? O Yahweh, my God, please let your hand be against me and against the house of my father, but against your people, [let there be] no plague."