And put a knife to thy throat, if thou be a man given to appetite.
And put a knife to thy throat, if thou (be) a man given to appetite - restrain thy gluttony as it were with a knife applied to thy throat (cf. Psalms 39:1). It is better to put a knife to thy throat, so as to keep thyself in fear the whole time of the banquet, than by want of self-restraint to fall into excess.