'Sinned Against the Lord' in the Bible

“Then you answered and said to me, ‘We have sinned against the Lord. We will go up and fight, just as the Lord our God has commanded us.’ So you equipped every man with weapons of war, and regarded it as easy to go up into the hill country.

And I saw that you had indeed sinned against the Lord your God. You had made for yourselves a molten calf (idol). You had turned aside quickly from the way which the Lord had commanded you.