'Obey' in the Bible

Why then didn't you obey the voice of Yahweh, but took the spoils, and did that which was evil in the sight of Yahweh?"

Samuel said, "Has Yahweh as great delight in burnt offerings and sacrifices, as in obeying the voice of Yahweh? Behold, to obey is better than sacrifice, and to listen than the fat of rams.

Because you didn't obey the voice of Yahweh, and didn't execute his fierce wrath on Amalek, therefore Yahweh has done this thing to you this day.