(בראשית מט, כב): בָּנוֹת צָעֲדָה עֲלֵי שׁוּר וגו', אַתְּ מוֹצֵא בְּשָׁעָה שֶׁיָּצָא יוֹסֵף לִמְלֹךְ עַל מִצְרַיִם הָיוּ בְּנוֹת מְלָכִים מְצִיצוֹת עָלָיו דֶּרֶךְ הַחֲרַכִּין וְהָיוּ מַשְׁלִיכוֹת עָלָיו שֵׁירִין וְקָטֶלִין וּנְזָמִים וְטַבָּעוֹת, כְּדֵי שֶׁיִּתְלֶה עֵינָיו וְיַבִּיט בָּהֶן, אַף עַל פִּי כֵן לֹא הָיָה מַבִּיט בָּהֶן
When Joseph went forth to rule over Egypt, daughters of kings used to look at him through the lattices and throw bracelets, neccklets, earrings, and finger rings to him, so that he might lift up his eyes and look at them; yet he did not look at them......
(ב) אֵ֣לֶּה ׀ תֹּלְד֣וֹת יַעֲקֹ֗ב יוֹסֵ֞ף בֶּן־שְׁבַֽע־עֶשְׂרֵ֤ה שָׁנָה֙ הָיָ֨ה רֹעֶ֤ה אֶת־אֶחָיו֙ בַּצֹּ֔אן וְה֣וּא נַ֗עַר אֶת־בְּנֵ֥י בִלְהָ֛ה וְאֶת־בְּנֵ֥י זִלְפָּ֖ה נְשֵׁ֣י אָבִ֑יו וַיָּבֵ֥א יוֹסֵ֛ף אֶת־דִּבָּתָ֥ם רָעָ֖ה אֶל־אֲבִיהֶֽם׃
(2) This, then, is the line of Jacob: At seventeen years of age, Joseph tended the flocks with his brothers, as a helper to the sons of his father’s wives Bilhah and Zilpah. And Joseph brought bad reports of them to their father.
(ב) אֵ֣לֶּה ׀ תֹּלְד֣וֹת יַעֲקֹ֗ב יוֹסֵ֞ף בֶּן־שְׁבַֽע־עֶשְׂרֵ֤ה שָׁנָה֙ הָיָ֨ה רֹעֶ֤ה אֶת־אֶחָיו֙ בַּצֹּ֔אן וְה֣וּא נַ֗עַר אֶת־בְּנֵ֥י בִלְהָ֛ה וְאֶת־בְּנֵ֥י זִלְפָּ֖ה נְשֵׁ֣י אָבִ֑יו וַיָּבֵ֥א יוֹסֵ֛ף אֶת־דִּבָּתָ֥ם רָעָ֖ה אֶל־אֲבִיהֶֽם׃
(2) This, then, is the line of Jacob: At seventeen years of age, Joseph tended the flocks with his brothers, as a helper to the sons of his father’s wives Bilhah and Zilpah. And Joseph brought bad reports of them to their father.
(3) את בני בלהה WITH THE SONS OF BILHAH — meaning that he made it his custom to associate with the sons of Bilhah because his brothers slighted them as being sons of a hand-maid; therefore he fraternised with them.
(ב) אלא ודאי שכל האחים בני הגבירות, היו מזלזלים בבני השפחות לקרות אמותם פלגשים ושפחות, ואת בניהם קראו עבדים, ויוסף לבד היה מתחבר אל בני בלהה וזלפה כי אמר שהם נשי אביו ממש
Kli Yakar on Genesis 37:2:5
The older brothers would make fun of the younger brothers who were born to maids and say that their mothers were concubines and slaves. Joseph would say that they were the children of Jacob's wives.
(ב) אֵ֣לֶּה ׀ תֹּלְד֣וֹת יַעֲקֹ֗ב יוֹסֵ֞ף בֶּן־שְׁבַֽע־עֶשְׂרֵ֤ה שָׁנָה֙ הָיָ֨ה רֹעֶ֤ה אֶת־אֶחָיו֙ בַּצֹּ֔אן וְה֣וּא נַ֗עַר אֶת־בְּנֵ֥י בִלְהָ֛ה וְאֶת־בְּנֵ֥י זִלְפָּ֖ה נְשֵׁ֣י אָבִ֑יו וַיָּבֵ֥א יוֹסֵ֛ף אֶת־דִּבָּתָ֥ם רָעָ֖ה אֶל־אֲבִיהֶֽם׃
(2) This, then, is the line of Jacob: At seventeen years of age, Joseph tended the flocks with his brothers, as a helper to the sons of his father’s wives Bilhah and Zilpah. And Joseph brought bad reports of them to their father.
Mishneh Torah, Human Dispositions 6:7
(7) He who beholds his fellow sinning or following an unrighteous path, is obliged to return him toward the good, and to let him know that he is actually sinning against himself in doing bad things for, it is said: "And you shall indeed rebuke your neighbor" (Lev. 19.17). He who rebukes his fellow, whether it be regarding a sin committed between man and man, or whether it be regarding matters between man and God, it is essential that the rebuke be administered only between them both; and he shall speak to him calmly, employing soft language, telling him that he only mentions it for his own good, to bring him to a life in the world to come.