'Lord's' in the Bible

And David said unto him, How wast thou not afraid to stretch forth thine hand to destroy the LORD'S anointed?

And David said unto him, Thy blood be upon thy head; for thy mouth hath testified against thee, saying, I have slain the LORD'S anointed.

But Abishai the son of Zeruiah answered and said, Shall not Shimei be put to death for this, because he cursed the LORD'S anointed?

And David said to Abishai, Now shall Sheba the son of Bichri do us more harm than did Absalom: take thou thy lord's servants, and pursue after him, lest he get him fenced cities, and escape us.

But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of the LORD'S oath that was between them, between David and Jonathan the son of Saul.