'Sinned' in the Bible

let Your eyes be open and Your ears be attentive to hear Your servant’s prayer that I now pray to You day and night for Your servants, the Israelites. I confess the sins we have committed against You. Both I and my father’s house have sinned.

You warned them to turn back to Your law,but they acted arrogantlyand would not obey Your commands.They sinned against Your ordinances,which a person will live by if he does them.They stubbornly resisted,stiffened their necks, and would not obey.