Each person according to his ability, each according to his strength
Each one according to his ability. Every person should make an effort that matches his own strength.
("The Holy One, blessed be He, said: Whoever knows how to tend the flock, each according to his ability, let him come and tend My people" – Shemot Rabbah (Vilna), Parashat Shemot, section 2)
Translation
Expression (Hebrew)
אִישׁ אִישׁ לְפִי כֹּחוֹ, אִישׁ לְפִי כֹּחוֹ
Definition (Hebrew)
כָּל אֶחָד בְּהֶתְאֵם לִיכָלְתּוֹ. כָּל אָדָם בְּמַאֲמָץ הַתּוֹאֵם אֶת כּוֹחוֹתָיו.
("אָמַר הקב"ה: מִי שֶׁהוּא יוֹדֵעַ לִרְעוֹת הַצֹּאן אִישׁ לְפִי כּוֹחוֹ יָבֹא וְיִרְעֶה בְּעַמִּי" - שְׁמוֹת רַבָּה (וִילְנָא) פָּרָשַׁת שְׁמוֹת פָּרָשָׁה ב)