The word "dwelling" that is written in connection with forbidden fat and blood -- why do I need it? It was needed, for it might have entered your mind to say: since it is written in the section dealing with the sacrifices, the prohibition of fat and blood should apply only at a time when there is a sacrifice, and at a time when there is no sacrifice it should not apply. Therefore it teaches us that the prohibition holds in all times and places. The word "dwelling" that the Merciful One wrote in connection with unleavened bread and bitter herbs -- why do I need it? It was needed, for it might have entered your mind to say: since it is written, "with unleavened bread and bitter herbs they shall eat it" (Numbers 9:11), at a time when there is a Passover offering, yes, the obligation applies, but at a time when there is no Passover offering, no. Therefore it teaches us that the obligation of unleavened bread still applies. The word "entering" that the Merciful One wrote in connection with phylacteries and the firstling of a donkey -- why do I need it? It is needed for what the school of Rabbi Ishmael taught: perform this commandment, for through it you shall enter the Land.
Why the Torah Repeats Dwellings for Blood Matzah and Tefillin
Yalkut Shimoni on Torah 409:1
מוֹשָׁב דִּכְתִיב גַּבֵּי חֵלֶב וָדָם, לָמָּה לִי. אִצְטְרִיךְ, סַלְקָא דַעְתָּךְ אֲמִינָא, הוֹאִיל וּבְעִנְיָנָא דְקָרְבָּנוֹת כְּתִיבָא, בִּזְמַן דְּאִיכָּא קָרְבָּן לִיתְּסָר חֵלֶב וָדָם וּבִזְמַן דְּלֵיכָּא קָרְבָּן לָא לִיתְּסָר, קָא מַשְׁמָע לָן. מוֹשָׁב דִּכְתַב רַחֲמָנָא גַּבֵּי מַצָּה וּמָרוֹר לָמָּה לִי. אִצְטְרִיךְ, סַלְקָא דַּעְתָּךְ אֲמִינָא, הוֹאִיל וּכְתִיב "עַל מַצּוֹת וּמְרוֹרִים יֹאכְלֻהוּ", בִּזְמַן דְּאִיכָּא פֶּסַח, אֵין, בִּזְמַן דְּלֵיכָּא פֶּסַח, לָא קָא מַשְׁמָע לָן. בִּיאָה דְּכְתַב רַחֲמָנָא גַּבֵּי תְּפִלִּין וּפֶטֶר חֲמוֹר, לָמָּה לִי. מִיבָּעְיָא לֵיהּ, לִכְדְּתָנָא דְּבֵי רַבִּי יִשְׁמָעֵאל, עֲשֵׂה מִצְוָה זוֹ, שֶׁבִּשְׁבִילָהּ תִּכָּנֵס לָאָרֶץ.