If thou hast understanding, answer thy neighbour; if not, lay thy hand upon thy mouth.
WEB
Sirach 5:12
If you have understanding, answer your neighbor; but if not, put your hand over your mouth.
Parallel Translations
If you have understanding, answer your neighbor; if not, lay your hand upon your mouth.
If thou hast understanding, answer thy neighbour; if not, lay thy hand upon thy mouth.