'Command' in the Bible

So Saul died on account of his sin which he had sinned against Yahweh concerning the command of Yahweh that he did not keep. He also consulted a medium to seek [guidance].

And from the men of Issachar: {men who were skilled in understanding the times} to know what Israel should do. Their chiefs [were] two hundred, and all their kinsmen [were] under their command.

Then David said to God, "Was it not I [who] gave a command to count the people? Now I [am] he who has sinned, and I have certainly done wickedness, but these sheep, what have they done? O Yahweh, my God, please let your hand be against me and against the house of my father, but against your people, [let there be] no plague."