אֵין שְׁנֵי מַלְאָכִים עוֹשִׂים שְׁלִיחוּת אַחַת

ביטוי (אנגלית)

Two angels do not perform one mission

הגדרה (אנגלית)

Each angel fulfills only a single role. By extension: it is not advisable to give two people responsibility for one matter. It is better to have one person accountable, rather than splitting responsibility between two different parties.

(“It was taught: one angel does not perform two missions, nor do two angels perform one mission… Michael delivered his message and departed, Gabriel was sent to overturn Sodom, and Raphael to save Lot” – Genesis Rabbah (Vilna), Parashat Vayera, section 50)