Chulin5: 5
„יוֹם אֶחָד“ הָאָמוּר בְּ„אֹתוֹ וְאֶת־ בְּנוֹ,“ הַיּוֹם הוֹלֵךְ אַחַר הַלַּיְלָה. אֶת־זוֹ דָרַשׁ שִׁמְעוֹן בֶּן־זוֹמָא: נֶאֱמַר בְּמַעֲשֵׂה בְרֵאשִׁית: „יוֹם אֶחָד,“ וְנֶאֱמַר בְּאֹתוֹ וְאֶת־בְּנוֹ: „יוֹם אֶחָד.“ מַה יוֹם אֶחָד הָאָמוּר בְּמַעֲשֵׂה בְרֵאשִׁית, הַיּוֹם הוֹלֵךְ אַחַר הַלַּיְלָה, אַף יוֹם אֶחָד הָאָמוּר בְּאֹתוֹ וְאֶת־בְּנוֹ, הַיּוֹם הוֹלֵךְ אַחַר הַלַּיְלָה.
‘‘One day’’ that is mentioned in connection with ‘‘it and its offspring’’ [means that] the day follows the night. This is what Shimon ben Zoma expounded: ‘‘One day’’ is mentioned in the account of the Creation (Gen. 1:5), and ‘‘one day’’ is mentioned in connection with ‘‘it and its offspring’’ (Lev. 22:28). Just as in the ‘‘one day’’ mentioned in the account of the Creation, the day follows the night, so too in the ‘‘one day’’ mentioned in connection with ‘‘it and its offspring,’’ the day follows the night.