בַּבֹּ֙קֶר֙ זְרַ֣ע אֶת־זַרְעֶ֔ךָ וְלָעֶ֖רֶב אַל־תַּנַּ֣ח יָדֶ֑ךָ כִּי֩ אֵֽינְךָ֨ יוֹדֵ֜ע אֵ֣י זֶ֤ה יִכְשָׁר֙ הֲזֶ֣ה אוֹ־זֶ֔ה וְאִם־שְׁנֵיהֶ֥ם כְּאֶחָ֖ד טוֹבִֽים׃
너는 아침에 씨를 뿌리고 저녁에도 손을 거두지 말라 이것이 잘 될는지, 저것이 잘 될는지, 혹 둘이 다 잘 될는지 알지 못함이니라
Yevamot
They said That Rabbi Akiva had twelve thousand pairs of disciples, from Gabbat to Antifaras; and they all died at the same time because they did not treat each other with respect.