"And he went in also to Rachel, and he loved Rachel more than Leah, and he served with him yet another seven years" (Genesis 29:30). It is the way of the world that a laborer works for a householder faithfully for two or three years, and in the end he grows lazy. But here, just as the first years were complete, so were the latter years complete; just as the first were in faithfulness, so were the latter in faithfulness. Rabbi Yochanan said: It is written, "Jacob fled to the field of Aram, and Israel served for a wife" (Hosea 12:13). He said to them: Your pattern resembles Jacob's. Just as Jacob, before he married a wife, was enslaved [in labor], and after he married, was enslaved, so too you: before the redeemer was born you were enslaved, and after the redeemer was born you were enslaved.
Jacob's Steadfast Labor as a Model of Faithfulness
Yalkut Shimoni on Torah 125:4
(בראשית כט ל) וַיָּבֹא גַּם אֶל רָחֵל וַיֶּאֱהַב גַּם אֶת רָחֵל מִלֵּאָה וַיַעֲבֹד עִמּוֹ עוֹד שֶׁבַע שָׁנִים אֲחֵרוֹת. בְּנוֹהַג שֶׁבָּעוֹלָם פּוֹעֵל עוֹשֶׂה מְלָאכָה עִם בַּעַל הַבַּיִת שְׁתַּיִם וְשָׁלשׁ שָׁנִים בֶּאֱמוּנָה, וּלְבַסּוֹף הוּא מִתְעַצֵּל, בְּרַם הָכָא מָה הָרִאשׁוֹנוֹת שְׁלֵמוֹת, אַף הָאַחֲרוֹנוֹת שְׁלֵמוֹת, מָה הָרִאשׁוֹנוֹת בֶּאֱמוּנָה, אַף הָאַחֲרוֹנוֹת בֶּאֱמוּנָה אָמַר רַבִּי יוֹחָנָן, כְּתִיב "וַיִּבְרַח יַעֲקֹב שְׂדֵה אֲרָם וַיַעֲבֹד יִשְׂרָאֵל בְּאִשָּׁה", אָמַר לָהֶם דֻּגְמָא שֶׁלָּכֶם דּוֹמָה לְיַעֲקֹב מַה יַעֲקֹב עַד שֶׁלֹּא נָשָׂא אִשָּׁה נִשְׁתַּעְבֵּד וּמִשֶּׁנָּשָׂא מִשְׁתַּעְבֵּד אַף אַתֶּם עַד שֶׁלֹּא נוֹלַד גּוֹאֵל נִשְׁתַּעְבַּדְתֶּם וּמִשֶּׂנוֹלַד גּוֹאֵל מִשְׁתַּעְבְּדִין.