The Sifre deduced from the words "You shall not plant an Asherah of any kind of tree beside the altar of the Lord your God" in that planting a tree on the Temple Mount would violate a commandment. Rabbi Eliezer ben Jacob deduced from the prohibition against any kind of tree beside the altar in that wooden columns were not allowed in the Temple courtyard. The ‘’Gemara’’ explained that it was not permitted to build with wood near the altar. Rav Chisda, however, taught that baetyls were permitted.