'Erred' in the Bible

Then Saul said, "I have sinned. Return, my son David; for I will no more do you harm, because my life was precious in your eyes this day. Behold, I have played the fool, and have erred exceedingly."

"Teach me, and I will hold my peace. Cause me to understand wherein I have erred.

If it is true that I have erred, my error remains with myself.