Sirach (Ecclesiasticus) 5:12

In 4 translations

KJV: If thou hast understanding, answer thy neighbour; if not, lay thy hand upon thy mouth.
WEB: If you have understanding, answer your neighbor; but if not, put your hand over your mouth.
DRC5:14: If thou have understanding, answer thy neighbour: but if not, let thy hand be upon thy mouth, lest thou be surprised in an unskillful word, and be confounded.
LXXE: If thou hast understanding, answer thy neighbour; if not, lay thy hand upon thy mouth.

LXX-Br: Εἰ ἔστι σοι σύνεσις, ἀποκρίθητι τῷ πλησίον· εἰ δὲ μὴ, ἡ χείρ σου ἔστω ἐπὶ στόματί σου.

Verse numbering differs between Bibles