When we sin, we sin against God

[TonyChanYT]

Joseph thought adultery was a sin against God in Genesis 39:

9 He is not greater in this house than I am, nor has he kept back anything from me except you, because you are his wife. How then can I do this great wickedness and sin against God?”

David thought he sinned against God in Psalm 51:

4 Against you, you only, have I sinned and done what is evil in your sight; so you are right in your verdict and justified when you judge.

The prodigal son in Luke 15:

21 The son declared, 'Father, I have sinned against heaven and against you. I am no longer worthy to be called your son.'

1 Corinthians 8:

12 When you sin against them in this way and wound their weak conscience, you sin against Christ.

When we disobey God's commands, we sin against God and he judges us, Isaiah 33:

22a For the Lord is our judge; the Lord is our lawgiver.