From where does this thing that people say derive: "sixty pangs reach the teeth of one who hears his fellow eat and does not eat"? As it is said, "but me, even me your servant, and Zadok the priest" and so forth (1 Kings 1:26). He said to him: you say it from there, and I say it from here, "And Isaac brought her into the tent" (Genesis 24:67), and it is written after it, "And Abraham took another wife." Rabbi Shimon ben Lakish in the name of Bar Kappara: the addition of the Holy One, blessed be He, is greater than the original. Cain was the original, and Abel, because he was an addition, was born together with his two twin sisters. Joseph was the original, and Benjamin, because he was an addition, produced ten sons, as it is said, "and the sons of Benjamin: Bela" and so forth (Genesis 46:21). Er was the original, and Shelah, because he was an addition, produced ten houses of judgment, as it is said, "the sons of Shelah son of Judah: Er the father of Lekhah, and Ladah the father of Mareshah" and so forth (1 Chronicles 4:21). The original years of Job were only two hundred and ten, and one hundred and forty years were added to him, as it is said, "And Job lived after this a hundred and forty years" (Job 42:16). The original days of Hezekiah's reign were only fourteen years, and fifteen years were added to him, as it is said, "Behold, I will add to your days fifteen years" (Isaiah 38:5). Ishmael was the original, and the children of Keturah, because they were an addition, "And she bore him Zimran" and so forth. Since the prophets saw that the addition of the Holy One, blessed be He, is greater than the original, they arose and blessed Israel with an addition: "May the LORD add to you, as you are, a thousand times more" (Deuteronomy 1:11); "May the LORD add to you, you and your children" (Psalms 115:14). And even in the time to come it is written, "The LORD will set His hand again a second time to recover the remnant of His people" (Isaiah 11:11). "Zimran" (Genesis 25:2): that they made music in the world; "Yokshan": that they grew hard in the world. And the rabbis say: "Zimran," that they played music on the drum for idolatry, and "Yokshan," that they struck the drum for idolatry. "And Yokshan begot Sheba and Dedan" (Genesis 25:3): even though they are rendered as merchants and traders and heads of peoples, they are all heads of peoples.
God's Addition Is Always Greater Than the Original
Yalkut Shimoni on Torah 109:16
מִנָּא הָא מִלְתָּא דְּאַמְרֵי אִינְשֵׁי שִׁתִּין תַּכְלֵי מַטְיָיה לְכָּכָא דְקָל חַבְרֵיהּ שָׁמַע וְלֹא אָכַל שֶׁנֶּאֱמַר "וְלִי אֲנִי עַבְדְּךָ וּלְצָדוֹק הַכֹּהֵן" וְגוֹ' אָמַר לֵיהּ, אַתְּ אָמַר מֵהָתָם, וַאֲנָא אֲמִינָא מֵהָכָא, וַיְבִיאֶהָ יִצְחָק הָאֹהֱלָה וּכְתִיב בַּתְרֵיהּ וַיֹּסֶף אַבְרָהָם. רַבִּי שִׁמְעוֹן בֶּן לָקִישׁ בְּשֵׁם בַּר קַפָּרָא, תּוֹסַפְתּוֹ שֶׁל הַקָּדוֹשׁ בָּרוּךְ הוּא מְרֻבָּה עַל הָעִיקָר. קַיִן עִיקָר וְהֶבֶל עַל יְדֵי שֶׁהוּא תּוֹסֶפֶת נוֹלַד הוּא וּשְׁתֵּי תְּאוֹמוֹתָיו יוֹסֵף עִיקָר וּבִנְיָמִין עַל יְדֵי שֶׁהוּא תּוֹסֶפֶת מַעֲמִיד עֲשָׂרָה, שֶׁנֶּאֱמַר (בראשית מו, כא) "וּבְנֵי בִּנְיָמִין בֶּלַע" וְגוֹ'. עֵר עִיקָר וְשֵׁלָה עַל יְדֵי שֶׁהוּא תּוֹסֶפֶת מַעֲמִיד עֲשָׂרָה בָּתֵּי דִּינִין, שֶׁנֶּאֱמַר "בְּנֵי שֵׁלָה בֶּן יְהוּדָה עֵר אֲבִי לֵכָה וְלַעְדָּה אֲבִי מָרֵשָׁה" וְגוֹ'. עִיקָר שְׁנוֹתָיו שֶׁל אִיּוֹב לֹא הָיוּ אֶלָּא מָאתַיִם וְעֶשֶׂר שָׁנִים וְנִתּוֹסְפוּ לוֹ מֵאָה וְאַרְבָּעִים שָׁנָה שֶׁנֶּאֱמַר (איוב מב, טז) "וַיְחִי אִיּוֹב אַחֲרֵי זֹאת מֵאָה וְאַרְבָּעִים שָׁנָה". עִיקָר [יְמֵי] מַלְכוּתוֹ שֶׁל חִזְקִיָּהוּ לֹא הָיוּ אֶלָּא אַרְבַּע עֶשְׂרֵה שָׁנָה, וְנִתּוֹסְפוּ לוֹ חֲמֵשׁ עֶשְׂרֵה שָׁנָה, שֶׁנֶּאֱמַר (ישעיה לח, ה) "הִנְּנִי יוֹסִיף עַל יָמֶיךָ חֲמֵשׁ עֶשְׂרֵה שָׁנָה". יִשְׁמָעֵאל עִיקָר, וּבְנֵי קְטוּרָה עַל יְדֵי שֶׁהֵן תּוֹסֶפֶת וַתֵּלֶד לוֹ אֶת זִמְרָן וְגוֹ'. כֵּיוָן שֶׁרָאוּ הַנְּבִיאִים שֶׁתּוֹסַפְתּוֹ שֶׁל הַקָּדוֹשׁ בָּרוּךְ הוּא מְרֻבָּה עַל הָעִיקָר עָמְדוּ וּבֵרְכוּ אֶת יִשְׂרָאֵל בְּתוֹסֶפֶת. "יוֹסֵף ה' עֲלֵיכֶם כָּכֶם אֶלֶף פְּעָמִים". (תהלים קטו, יד) "יוֹסֵף ה' עֲלֵיכֶם עֲלֵיכֶם וְעַל בְּנֵיכֶם". וְאַף לֶעָתִיד לָבֹא כְּתִיב (ישעיה יא, יא) "יוֹסִיף ה' שֵׁנִית יָדוֹ לִקְנוֹת אֶת שְׁאָר עַמּוֹ". (בראשית כה ב) זִמְרָן, שֶׁהָיוּ מְזַמְּרִין בָּעוֹלָם, יָקְשָׁן, שֶׁהָיוּ מִתְקַשִּׁין בָּעוֹלָם, וְרַבָּנָן אָמְרִין, זִמְרָן שֶׁהָיוּ מְזַמְּרִין בַּתֹּף לַעֲבוֹדָה זָרָה, וְיָקְשָׁן שֶׁהָיוּ מַקִּישִׁין בַּתֹּף לַעֲבוֹדָה זָרָה. (בראשית כה ג) וְיָקְשָׁן יָלַד אֶת שְׁבָא וְאֶת דְּדָן, אַף עַל גַּב דְּאִנּוּן מְתַרְגְּמִין תַגָּרִין וְלוֹפְרִין וְרָאשֵׁי אֻמִּין כֻּלָּן רָאשֵׁי אֻמּוֹת הֵן.