'Sin Against the Lord' in the Bible

“As for me, I vow that I will not sin against the Lord by ceasing to pray for you. I will teach you the good and right way.

He then said, “Go among the troops and say to them, ‘Each man must bring me his ox or his sheep. Do the slaughtering here and then you can eat. Don’t sin against the Lord by eating meat with the blood in it.’” So every one of the troops brought his ox that night and slaughtered it there.