כְּצִנַּת־שֶׁ֨לֶג ׀ בְּי֬וֹם קָצִ֗יר צִ֣יר נֶ֭אֱמָן לְשֹׁלְחָ֑יו וְנֶ֖פֶשׁ אֲדֹנָ֣יו יָשִֽׁיב׃ (פ)
As the cold of snow in the time of harvest, So is a faithful messenger to him that sendeth him; For he refresheth the soul of his master. .
Read halakhic rulings (Jewish law) on Proverbs 25:13: and classical halakhic sources.