en_tn/pro/26/09.md

A thornbush held in the hand of a drunk

A drunk cannot control his motions, so will injure himself and others when he holds a thornbush. (See: rc://en/ta/man/translate/figs-metonymy)

is like a proverb in the mouth of a fool

The writer compares the danger a drunk person with a thornbush can be to the proverb a fool will use wrongly. (See: rc://en/ta/man/translate/figs-simile)

a proverb in the mouth of fools

Translate as you did in Proverbs 26:7.

hires

"pays to do a job"