"the projections at the corners of the altar." This refers to the corners of the altar. They are shaped like the horns of an ox. See how you translated this in [Leviticus 4:7](../04/06.md).
# to cleanse it
The altar being fit to be used for God's purposes is spoken of as if it were physically clean. (See: [[rc://en/ta/man/translate/figs-metaphor]])
# set it apart to Yahweh, away from the unclean actions of the people of Israel
The altar being dedicated to Yahweh is spoken of as if it were physically separated from the sins of the people. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Sinful actions which make people unacceptable to Yahweh are spoken of as if they were physically unclean actions. (See: [[rc://en/ta/man/translate/figs-metaphor]])