Exodus 3:14
JPS-1917וַיֹּ֤אמֶר אֱלֹהִים֙ אֶל־מֹשֶׁ֔ה אֶֽהְיֶ֖ה אֲשֶׁ֣ר אֶֽהְיֶ֑ה וַיֹּ֗אמֶר כֹּ֤ה תֹאמַר֙ לִבְנֵ֣י יִשְׂרָאֵ֔ל אֶֽהְיֶ֖ה שְׁלָחַ֥נִי אֲלֵיכֶֽם׃
And God said unto Moses: ‘I AM THAT I AM’; and He said: ‘Thus shalt thou say unto the children of Israel: I AM hath sent me unto you.’
פירוש רש״י
אהיה אשר אהיה I AM THAT I AM — I will be with them in this sorrow — I Who I will be with them in the subjection they will suffer at the hands of other kingdoms (Berakhot 9b). Whereupon Moses said to him: Lord of the Universe! Why should I mention to them other sorrows: they have enough with this sorrow! God replied to him: You have spoken rightly — כה תאמר THUS SHALT THOU SAY etc.… Ehyeh, “I am” — without the addition of אשר אהיה which has reference to future sorrows — has sent me unto you”.
תרגומים נוספים
וַיֹּ֤אמֶר אֱלֹהִים֙ אֶל־מֹשֶׁ֔ה אֶֽהְיֶ֖ה אֲשֶׁ֣ר אֶֽהְיֶ֑ה וַיֹּ֗אמֶר כֹּ֤ה תֹאמַר֙ לִבְנֵ֣י יִשְׂרָאֵ֔ל אֶֽהְיֶ֖ה שְׁלָחַ֥נִי אֲלֵיכֶֽם׃
And God said to Moshe, Eheye Asher Eheye (I will ever be what I now am): and he said, Thus shalt thou say to the children of Yisra᾽el, Eheye (I Am) has sent me to you.