'Obeys' in the Bible

Who is among you who fears Yahweh, who obeys the voice of his servant? He who walks in darkness, and has no light, let him trust in the name of Yahweh, and rely on his God.

Yahweh thunders his voice before his army; for his forces are very great; for he is strong who obeys his command; for the day of Yahweh is great and very awesome, and who can endure it?