Drink now employs a particle meaning “please” in this context, so this clause may be rendered “Please drink.” See the note below on the next verse also.

Be merry with us is literally “become with us unto joy.” Moore points out that the phrase “become with us” is used by the elders in their crude sexual proposition to Susanna (Dan 13.20 in Catholic Bibles; Sus 20 in Protestant Apocrypha). See also its use in Tob 3.8. Us means “me”; see the notes on verses 10-12.

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on Judith. (UBS Helps for Translators). New York: UBS, 2001. For this and other handbooks for translators see here.