Halakhah zu Wajikra 6:2

And they would make three arrangements of fire on the altar every day. The first one was large, [and] upon it were the daily sacrifice and the other sacrifices offered; the second one on its side was smaller than it, [and] the fire was taken from it in the censer to burn the incense every day; and the third arrangement did not have anything upon it, so as to fulfill the commandment of the fire, as it is stated, "A perpetual fire shall burn, etc." (Yoma 43b). And there are three passages about the topic, which instruct about these three arrangements, as we learned from the tradition. As they, may their memory be blessed, said (Yoma 45b), "'Upon its burning' (Leviticus 6:2), that is the large arrangement; 'and the fire of the altar shall burn upon it' (Leviticus 6:2), that is the second arrangement of the incense; 'And the fire of the altar shall burn upon it' (Leviticus 6:5), that is the third arrangement for the fulfillment of the fire." And the rest of its details are elucidated in the fourth chapter of Yoma and the second of Tamid.