Kedumah 22 (3500) 171

וַיַּעַל לוֹט מִצּוֹעַר וַיֵּשֶׁב בָּהָר, וּשְׁתֵּי בְנֹתָיו עִמּוֹ, כִּי יָרֵא, לָשֶׁבֶת בְּצוֹעַר; וַיֵּשֶׁב, בַּמְּעָרָה--הוּא, וּשְׁתֵּי בְנֹתָיו. וַתֹּאמֶר הַבְּכִירָה אֶל-הַצְּעִירָה, אָבִינוּ זָקֵן; וְאִישׁ אֵין בָּאָרֶץ לָבוֹא עָלֵינוּ, כְּדֶרֶךְ כָּל-הָאָרֶץ. לְכָה נַשְׁקֶה אֶת-אָבִינוּ יַיִן, וְנִשְׁכְּבָה עִמּוֹ; וּנְחַיֶּה מֵאָבִינוּ, זָרַע. וַתַּשְׁקֶיןָ אֶת-אֲבִיהֶן יַיִן, בַּלַּיְלָה הוּא; וַתָּבֹא הַבְּכִירָה וַתִּשְׁכַּב אֶת-אָבִיהָ, וְלֹא-יָדַע בְּשִׁכְבָהּ וּבְקוּמָהּ. וַיְהִי, מִמָּחֳרָת, וַתֹּאמֶר הַבְּכִירָה אֶל-הַצְּעִירָה, הֵן-שָׁכַבְתִּי אֶמֶשׁ אֶת-אָבִי; נַשְׁקֶנּוּ יַיִן גַּם-הַלַּיְלָה, וּבֹאִי שִׁכְבִי עִמּוֹ, וּנְחַיֶּה מֵאָבִינוּ, זָרַע. וַתַּשְׁקֶיןָ גַּם בַּלַּיְלָה הַהוּא, אֶת-אֲבִיהֶן--יָיִן; וַתָּקָם הַצְּעִירָה וַתִּשְׁכַּב עִמּוֹ, וְלֹא-יָדַע בְּשִׁכְבָהּ וּבְקֻמָהּ. וַתַּהֲרֶיןָ שְׁתֵּי בְנוֹת-לוֹט, מֵאֲבִיהֶן. וַתֵּלֶד הַבְּכִירָה בֵּן, וַתִּקְרָא שְׁמוֹ מוֹאָב: הוּא אֲבִי-מוֹאָב, עַד-הַיּוֹם. וְהַצְּעִירָה גַם-הִוא יָלְדָה בֵּן, וַתִּקְרָא שְׁמוֹ בֶּן-עַמִּי: הוּא אֲבִי בְנֵי-עַמּוֹן, עַד-הַיּוֹם

וַיהוָה פָּקַד אֶת-שָׂרָה, כַּאֲשֶׁר אָמָר. וַתַּהַר וַתֵּלֶד שָׂרָה לְאַבְרָהָם בֵּן, לִזְקֻנָיו. וַתֹּאמֶר שָׂרָה--צְחֹק, עָשָׂה לִי אֱלֹהִים: כָּל-הַשֹּׁמֵעַ, יִצְחַק-לִי. וַתֹּאמֶר, מִי מִלֵּל לְאַבְרָהָם, הֵינִיקָה בָנִים, שָׂרָה: כִּי-יָלַדְתִּי בֵן, לִזְקֻנָיו. וַיִּגְדַּל הַיֶּלֶד, וַיִּגָּמַל; וַיַּעַשׂ אַבְרָהָם מִשְׁתֶּה גָדוֹל, בְּיוֹם הִגָּמֵל אֶת-יִצְחָק. וַתֵּרֶא שָׂרָה אֶת-בֶּן-הָגָר הַמִּצְרִית, אֲשֶׁר-יָלְדָה לְאַבְרָהָם--מְצַחֵק. וַתֹּאמֶר, לְאַבְרָהָם, גָּרֵשׁ הָאָמָה הַזֹּאת, וְאֶת-בְּנָהּ: כִּי לֹא יִירַשׁ בֶּן-הָאָמָה הַזֹּאת, עִם-בְּנִי עִם-יִצְחָק. וַיֵּרַע הַדָּבָר מְאֹד, בְּעֵינֵי אַבְרָהָם, עַל, אוֹדֹת בְּנוֹ

Now Lot went up from Zoar and settled on the mountain, his two daughters with him, for he was afraid to remain in Zoar; he dwelt in a cave, he with his two daughters. The older one said to the younger, "Our father is old and there is no man in the land to marry us in the usual manner. Come, let us ply our father with wine and lay with him that we may give life to offspring through our father." So they plied their father with wine on that night; and the older one came and lay with her father, and he was not aware of her lying down and of her getting up. And it was on the next day that the older one said to the younger, "Behold, I lay with my father last night; let us ply him with wine tonight as well, and you come lay with him that we may give life to offspring through our father." So they plied their father with wine that night also; and the younger one got up and lay with him, and he was not aware of her lying down and of her getting up. Thus, Lot's two daughters conceived from their father. The older bore a son and she called his name Moab; he is the ancestor of Moab until this day. And the younger one also bore a son and she called his name Ben-Ammi; he is the ancestor of the children of Ammon until this day.
Hashem had remembered Sarah as He had said. Sarah conceived and bore a son unto Abraham in his old age. Sarah said, "God has made laughter for me; whoever hears will laugh for me." And she said, "Who is the One Who said to Abraham, 'Sarah would nurse children'? For I have borne a son in his old age!" The child grew and was weaned. Abraham made a great feast on the day Isaac was weaned. Sarah saw the son of Hagar, the Egyptian, whom she had born to Abraham, mocking. So she said to Abraham, "Drive out this slavewoman with her son, for the son of that slavewoman shall not inherit with my son, with Isaac!" The matter greatly distressed Abraham regarding his son.