'Sinned' in the Bible

Then David said to God, “I have sinned greatly because I have done this thing. But now, I beseech You, take away the wickedness and guilt of Your servant, for I have acted very foolishly.”

David said to God, “Is it not I who commanded the people to be counted? I am the one who has sinned and done evil; but as for these sheep [the people of Israel], what have they done? O Lord my God, please let Your hand be against me and my father’s house, but not against Your people that they should be plagued.”