In a sense, the entire first book of the Torah is a book of sibling intrigue, involving competition, jealousy and even murder. As Abel's bloodied, lifeless body lies on the...Read More
וַיִּֽחַר־אַ֨ף יְהֹוָ֜ה בְּמֹשֶׁ֗ה וַיֹּ֙אמֶר֙ הֲלֹ֨א אַהֲרֹ֤ן אָחִ֙יךָ֙ הַלֵּוִ֔י יָדַ֕עְתִּי כִּֽי־דַבֵּ֥ר יְדַבֵּ֖ר ה֑וּא וְגַ֤ם הִנֵּה־הוּא֙ יֹצֵ֣א לִקְרָאתֶ֔ךָ וְרָאֲךָ֖ וְשָׂמַ֥ח בְּלִבּֽוֹ׃
Hashem became angry with Moses, and He said, “There is your brother Aaron the Levite. He, I know, speaks readily. Even now he is setting out to meet you, and he will rejoice in his heart to see you.”
– Exodus 4:14
As son as he sees you he will rejoice in his heart. The reason why God had to tell him this was that Moses had not wanted to usurp the status of his older brother as he feared that this might lead to his becoming jealous of him.
– Daat Zkenim on Exodus 4:14:1
Rabbi Mallai taught that as reward for Aaron’s lack of jealousy at seeing his brother Moses rise to greatness, as it is stated: “And he will see you and be glad in his heart,” he merited to become the High Priest, and for the breastplate of judgment to rest on his heart.
– Shabbat 139a:14
When he sees you he will be happy in his heart. The Torah informs us with this comment that neither of the two brothers would be jealous of the other’s rank. This is what inspired David to sing (Psalms 133:1) hinei mah tov umah na-eem shevet achim gam yachad, “how good and how pleasant it is that brothers sit together.”
– Rabbeinu Bachya, Shemot 4:14:2