אֵין מַלְאָךְ אֶחָד עוֹשֶׂה שְׁתֵּי שְׁלִיחֻיּוֹת

ביטוי (אנגלית)

One angel never performs two missions

הגדרה (אנגלית)

Every angel has only one task to perform. By extension: Usually it is better for a person to focus on a single responsibility and not handle several things at once, so that the task is done in the best way.

("It was taught: one angel never performs two missions... Rather, Michael delivered his message and departed, Gabriel was sent to overturn Sodom, and Raphael to save Lot" – Genesis Rabbah (Vilna), Parashat Vayera, section 50)