en_tn/2ch/20/18.md

bowed his head with his face to the ground ... fell down before Yahweh

These acts of worship that express humility and submission to God. (See: rc://en/ta/man/translate/translate-symaction)

All Judah

Here "Judah" refers to the people from Judah. AT: "All the people of Judah" (See: rc://en/ta/man/translate/figs-metonymy)

Kohathites and Korahites

These are the names of people groups descending from Kohath and Korah. (See: rc://en/ta/man/translate/translate-names)

with a very loud voice

This speaks of all the people praising Yahweh as if they together had one voice. AT: "with very loud voices" (See: rc://en/ta/man/translate/figs-metaphor)