bo - Pharaohs Night call

Why does the Torah tell us a second time that Pharoh Called Moshe at night the first time:

ל. וַיָּקָם פַּרְעֹה לַיְלָה

Then again a posuk later:

לא. וַיִּקְרָא לְמֹשֶׁה וּלְאַהֲרֹן לַיְלָה

What is the significance of the Night in the Second Posuk that it bears repeating?

Answer

In Posuk 28 it says וַיֹּאמֶר-לוֹ פַרְעֹה, לֵךְ מֵעָלָי; הִשָּׁמֶר לְךָ, אַל-תֹּסֶף רְאוֹת פָּנַי--כִּי בְּיוֹם רְאֹתְךָ פָנַי, תָּמוּת. The Posuk that says וַיִּקְרָא לְמֹשֶׁה וּלְאַהֲרֹן לַיְלָה was Pharoh saving face saying I am calling you as it is not daytime, it is nighttime. (Ohr Hachaim)