Deuteronomy 12:4

i. e., "The idolaters set up their altars and images on any high hill, and under every green tree at their pleasure, but ye shall not do so; the Lord Himself shall determine the spot for your worship, and there only shall ye seek Him." The religion of the Canaanites was human; its modes of worship were of man's devising. It fixed its holy places on the hills in the vain thought of being nearer heaven, or in deep groves where the silence and gloom might overawe the worshipper. But such superstitious appliances were not worthy of the true religion. God had revealed Himself to people in it, and manifested among them His immediate presence and power. He would Himself assign the sanctuary and the ritual of His own service.

12:4 Not do so - That is, not worship him in several places, mountains, and groves.