Shemot 4:22
*1. Source
וְאָמַרְתָּ֖ אֶל־פַּרְעֹ֑ה כֹּ֚ה אָמַ֣ר יְהֹוָ֔ה בְּנִ֥י בְכֹרִ֖י יִשְׂרָאֵֽל׃ Then you shall say to Pharaoh, ‘Thus says GOD: Israel is My first-born son.
2. Explanation
Moses must say to pharoah "I am god's first born".
2.1. Rashi
Moses must say to pharoah "I am god's first born". First-born=great one. He is chosen by god.
3. Elsewhere
3.1. References
3.2. In my garden
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