en_tn/jos/23/06.md

turning aside from it neither to the right hand nor to the left

Disobeying the commands of the law of Moses is spoken of as turning to the right or to the left away from a path. (See: rc://en/ta/man/translate/figs-metaphor)

you may not mix

Possible meanings are 1) having close friendship with them or 2) intermarrying with them.

mention

to speak of

their gods

This refers to the gods of the remaining nations.

cling to Yahweh

"hold tightly to Yahweh." Believing in Yahweh is spoken of as if they were holding tightly onto him. AT: "continue to believe in Yahweh" (See: rc://en/ta/man/translate/figs-metaphor)

to this day

"until the present time"