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The first altar after the Flood was built on a mountain (Genesis 8:20). Abraham also built an altar on a mountain (12:7, 8). It was on a mountain in Gilead that Laban and Jacob offered sacrifices (31:54). After the Israelites entered the Promised Land they were strictly enjoined to overthrow the high places of the Canaanites (Exodus 34:13; Deuteronomy 7:5; 12:2, 3), and they were forbidden to worship the Lord on high places (Deuteronomy 12:11-14), and were enjoined to use but one altar for sacrifices (Leviticus 17:3, 4; Deuteronomy 12; 16:21). The injunction against high places was, however, very imperfectly obeyed, and we find again and again mention made of them (2 Kings 14:4; 15:4,35; 2 Chronicles 15:17, etc.).