Tosefta for Proverbs 23:1

כִּֽי־תֵ֭שֵׁב לִלְח֣וֹם אֶת־מוֹשֵׁ֑ל בִּ֥ין תָּ֝בִ֗ין אֶת־אֲשֶׁ֥ר לְפָנֶֽיךָ׃

When thou sittest to eat with a ruler, consider well him that is before thee;