29:25כ״ט:כ״ה
1 א

ויהי בבקר והנה היא לאה. אֲבָל בַּלַּיְלָה לֹא הָיְתָה לֵאָה, לְפִי שֶׁמָּסַר יַעֲקֹב סִימָנִים לְרָחֵל, וּכְשֶׁרָאֲתָה רָחֵל שֶׁמַּכְנִיסִין לוֹ לֵאָה אָמְרָה: עַכְשָׁו תִּכָּלֵם אֲחוֹתִי, עָמְדָה וּמָסְרָה לָהּ אוֹתָן סִימָנִים (מגילה י"ג):

ויהי בבקר והנה הוא לאה AND IT CAME TO PASS, THAT IN THE MORNING, BEHOLD, IT WAS LEAH —But at night it was not Leah (i. e. he failed to recognise that it was Leah) because Jacob had given Rachel certain secret signs by which they could at all times recognise one another, and when Rachel saw that they were about to bring Leah to him for the marriage ceremony, she thought, “My sister may now be put to shame”, and she therefore readily transmitted these signs to her (Megillah 13b).