Musar for Megillah 56:18

On (32, 4): וישלח יעקב מלאכים לפניו אל עשו אחיו ארצה שעיר שדה אדום,"Jacob sent angels (resp. human messengers) ahead of him to his brother Esau to the land of Se'ir," Rashi comments that these were "real" angels. If that were so, it is difficult to understand Jacob making use of holy beings for a secular, totally private mission. He could just as well have sent human messengers! We have an explicit ruling that even nowadays, when the כהן cannot perform sacred duties due to the absence of the Temple, one must not employ a כהן to perform mundane tasks. How then could Jacob employ angels for such a purpose? (gloss of the Mordechai on Gittin).