לאמר לזרעך אתננה הראיתיך. כְּדֵי שֶׁתֵּלֵךְ וְתֹאמַר לְאַבְרָהָם לְיִצְחָק וּלְיַעֲקֹב, שְׁבוּעָה שֶׁנִּשְׁבַּע לָכֶם הַקָּבָּ"ה קִיְּמָהּ. וְזֶהוּ לאמר, לְכָךְ הֶרְאִיתִיהָ לְךָ, אֲבָל גְּזֵרָה הִיא מִלְּפָנַי שֶׁשָּׁמָּה לא תעבר, שֶׁאִלּוּלֵי כָךְ הָיִיתִי מְקַיֶּמְךָ עַד שֶׁתִּרְאֶה אוֹתָם נְטוּעִים וּקְבוּעִים בָהּ וְתֵלֵךְ וְתַגִּיד לָהֶם: לאמר לזרעך אתננה הראיתיך TO SAY, TO THY SEED WILL I GIVE IT, I HAVE LET THEE SEE IT, i.e. in order that you may go and say to Abraham, to Isaac and to Jacob: The oath which the Holy One, blessed be He, swore to you — that oath He has fulfilled. This is the force of לאמר (Berakhot 18b), “to say it”, viz., that you may say it — for that reason have I let you see it. But it is a decree from Me that שמה לא תעבר THERE YOU SHALL NOT CROSS OVER; for were this not so, I would keep you alive even until you saw them planted and settled in it, and you would then go and tell them (the patriarchs).