'Unfaithfully' in the Bible

“Tell the Israelites: When a man or woman commits any sin against another, that person acts unfaithfully toward the Lord and is guilty.

But when he became strong, he grew arrogant and it led to his own destruction. He acted unfaithfully against the Lord his God by going into the Lord’s sanctuary to burn incense on the incense altar.

They took their stand against King Uzziah and said, “Uzziah, you have no right to offer incense to the Lord—only the consecrated priests, the descendants of Aaron, have the right to offer incense. Leave the sanctuary, for you have acted unfaithfully! You will not receive honor from the Lord God.”

Why then should we hear about you doing all this terrible evil and acting unfaithfully against our God by marrying foreign women?”

I will make the land desolate because they have acted unfaithfully.” This is the declaration of the Lord God.

And the nations will know that the house of Israel went into exile on account of their iniquity, because they dealt unfaithfully with Me. Therefore, I hid My face from them and handed them over to their enemies, so that they all fell by the sword.