Numbers 16:39 (BSB)

So Eleazar the priest took the bronze censers brought by those who had been burned up, and he had them hammered out to overlay the altar,

From Numbers 16. Also in the ESV.

Commentary on Numbers 16:39

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 16:35-40: We must now look back to the door of the tabernacle, where we left the pretenders to the priesthood with their censers in their hands ready to offer incense; and here we find, I. Vengeance taken on them, Num 16:35.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 16:39: And Eleazar the priest took the brazen censers,.... The metal of which these censers were made is particularly observed, to show that they were fit for the use they were ordered to be put unto, namely, for a covering of the altar of burnt offering, which was covered with brass, that being very suitable, since fire was continually burning on it; and by this it...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Numbers 16:39: the brazen censers . . . made broad plates to be a memorial--The altar of burnt offerings, being made of wood and covered with brass, this additional covering of broad plates not only rendered it doubly secure against the fire, but served as a warning beacon to deter all from future invasions of the priesthood.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Numbers 16:36-40: Num 16:36-40 (Or Hebrew_Bible_17:1-5). After the destruction of the sinners, the Lord commanded that Eleazar should take up the censers “from between the burning,” i.e., from the midst of the men that had been burned, and scatter the fire (the burning coals in the pans) far away, that it might not be used any more.