Bilangan 5:26

5:26 Then the priest will take a handful of the grain offering as its memorial portion, burn it on the altar, and afterward make the woman drink the water.

Bilangan 28:3

28:3 You will say to them, ‘This is the offering made by fire which you must offer to the Lord: two unblemished lambs one year old each day for a continual ¹  burnt offering.

[28:3]  ¹ sn The sacrifice was to be kept burning, but each morning the priests would have to clean the grill and put a new offering on the altar. So the idea of a continual burnt offering is more that of a regular offering.