8623. And Moses built an altar. That this signifies for what is holy of worship and of memory, is evident from the signification of "an altar," as being the chief representative of the Lord (see n. 2777, 2811, 4489), and consequently what is holy of worship (n. 4541). That it is also for memory, is because in ancient times mounds were piled up as a witness unto and in memory of something that was to stand firm, and which they were to remember; and afterward also altars (n. 4192); in the present case in memory of the fact that because the hand of Amalek was against the throne of Jah, Jehovah would have war against him from generation to generation. That altars were erected for witness and memory, is also evident from the altar that the Reubenites, Gadites, and the half tribe of Manasseh built at the Jordan, concerning which they said to the sons of Israel, who on that account were disposed to make war against them, that they built it to be a witness that they would not worship Jehovah by burnt-offerings and sacrifices upon this altar, but upon the altar that was before the tabernacle; and therefore they called that altar "a witness between us and you that Jehovah is God" (Josh. 22:10-34).