'Erred' in the Bible

‘But when you unintentionally fail and do not observe all these commandments, which the Lord has spoken to Moses,

Then Saul said, “I have sinned. Return, my son David, for I will not harm you again because my life was precious in your sight this day. Hear me, I have played the fool and have done a very great wrong [to you].”

“Teach me, and I will be silent;And show me how I have erred.

“And if it were true that I have erred,My error would remain with me [and I would be conscious of it].