Exodus 29:36,37

36, 37. The altarto be fitted for sacred uses by atonement being made for it: the ceremony to be repeated, like the installation-ceremony, every day for seven days. The altar, as the work of human hands, was regarded as infected by a natural uncleanness, which had to be ceremonially removed before it could be used for sacred purposes. Cf. the atoning rites, to continue for seven days, prescribed by Ezek. for the installation of the altar of the restored Temple, Ezekiel 43:18-27.