וַ֠יִּסְעוּ כָּל־עֲדַ֨ת בְּנֵֽי־יִשְׂרָאֵ֧ל מִמִּדְבַּר־סִ֛ין לְמַסְעֵיהֶ֖ם עַל־פִּ֣י יְהוָ֑ה וַֽיַּחֲנוּ֙ בִּרְפִידִ֔ים וְאֵ֥ין מַ֖יִם לִשְׁתֹּ֥ת הָעָֽם׃
以色列全會眾照著永恆者的吩咐，從汛的曠野起行，一站一站地往前走，在利非訂安營；那裡沒有水給百姓喝。
Mishnah Rosh Hashanah
“And it came to pass, when Moses held up his hand Israel prevailed” etc. (Exodus 17:1. Did the hands of Moses wage war or break [Israel’s ability] to wage war? Rather this teaches that as long as Israel would look upwards and subject their hearts to their Father in heaven they prevailed, and if not they fell. Similarly, “Make for yourself a fiery serpent and mount it on a pole. And if anyone who is bitten shall look at it, he shall live” (Numbers 21:8). Did the serpent kill or did the serpent keep alive? Rather, when Israel would look upwards and subject their hearts to their Father in heaven, they were healed, and if not their [flesh] would melt away. A deaf-mute, a lunatic and a minor cannot cause others to fulfill their religious obligation. This is the general principle: one who is not himself obligated in the matter cannot perform it on behalf of others.