John Calvin's Commentary on the Bible - Leviticus 6:9
Verse 9 9.Command Aaron and his sons. He more distinctly explains what might have appeared to be omitted; nor is it without reason that he carefully enters into these full details, for since God prefers obedience to all sacrifices, he was unwilling that anything should remain doubtful as to the external rites, which were not otherwise of great importance; that they might learn to observe precisely, and with the most exact care, whatever the Law commanded, and that they should not obtrude... read more
Adam Clarke's Commentary on the Bible - Leviticus 6:13
The fire shall ever be burning - See on Leviticus 6:9 ; (note) and Leviticus 6:20 ; (note). In imitation of this perpetual fire, the ancient Persian Magi, and their descendants the Parses, kept up a perpetual fire; the latter continue it to the present day. This is strictly enjoined in the Zend Avesta , which is a code of laws as sacred among them as the Pentateuch is among the Jews. A Sagnika Brahmin preserves the fire that was kindled at his investiture with the poita, and never... read more