'Conscience' in the Bible

David rose and stealthily cut off the corner of Saul's robe. Afterwards, David's conscience bothered him because he had cut off the corner of Saul's robe.

this shouldn't be an obstacle or stumbling block for your majesty's conscience, that he poured out blood without cause or that your majesty delivered himself. When the LORD does good things for your majesty, remember your servant."

Later, David's conscience bothered him after he had numbered the army, so David told the LORD, "I have sinned greatly by what I did. But now I am asking you, please remove the guilt of your servant, since I have acted very foolishly."

I'll retain my righteousness and not compromise it; my conscience won't rebuke me at any time.

I will bless the LORD who has counseled me; indeed, my conscience instructs me during the night.