'Voice of the Lord' in the Bible

For if ye shall not hearken unto the voice of the LORD, but shall disobey the LORD's mouth: then shall the hand of the LORD be upon you and on your fathers.

And wherefore hast thou now not obeyed the voice of the LORD: But didst turn to the prey and hast wrought wickedness in the sight of the LORD?"

And Saul said unto Samuel, "I have obeyed the voice of the LORD, and went the way which the LORD sent me; and have brought Agag the king of the Amalekites, and have utterly destroyed the Amalekites.

because thou obeyedest not the voice of the LORD, nor executedest his fierce wrath upon the Amalekites. Therefore hath the LORD done this unto thee this day.