RobH_en_tn/num/16/45.md

so that I may consume them

God speaks of destroying them as if he would eat them. Alternate translation: "so that I may destroy them" or "and I will destroy them" (See: rc://en/ta/man/translate/figs-metaphor)

lay down with their faces to the ground

This indicates that Moses and Aaron are humbling themselves before God. (See: rc://en/ta/man/translate/translate-symaction)