Zohar Ki tetze
A set of Shofar blowing has ten blows תשרת-תשת-תרת that carry the ten letters of the YHVH יהוה name related to Zeir Anpin יוד-הא-ואו-הא. These letters are like shackles, spears and swords that break the other-side.
“וְהָאֵם רֹבֶצֶת עַל הָאֶפְרֹחִים אוֹ עַל הַבֵּיצִים לֹא תִקַּח הָאֵם עַל הַבָּנִים”
“and the mother sitting on the young or on the eggs, you shall not take the mother with the young.”
The ‘mother’ is Binah and the ‘chicks’ are the Israelites that need the mother for protection and nutrition. The ‘chicks’ ‘chirping’ to the mother is the aspect of the prayers the Israelites use to draw the mother to them. She is not coming down until they create the unification with Zeir Anpin using the Tefillin and the six words of the Shema Israel that correspond to the six sefirot of Zeir Anpin. Then the light of the six sefirot shines in the Shechina and ‘locked-in’ with the words of “Baruch Shem…”
The Shechina then reveals the light of Chassadim drawn from the upper levels to Malchut.
During the three major holidays of Pesach, Shavuot and Sukkot, the Shechina reveals the light of Zeir Anpin. During Pesach it is revealed through the Matzah that we eat on seven days. On Shavuot the light is revealed through the reading of the Torah that is Zeir Anpin. On Sukkot we have the seven days and the seven elements of the four species Lulav, Etrog, three Myrtle branches and two willow branches.