Psalms 122 describe the joy of the unification of the Light in Jerusalem (Malchut).
1: “A Song of Ascents, of David. I was glad when they said to me, ‘Let us go to the house of YHVH’”
The call to go to the house of God , which is the Holy Temple will bring joy.
2: “Our feet are standing Within your gates, O Jerusalem,”
3: “Jerusalem, that is built As a city that is joined together;”
The Israelites welcome the unification of the Light and Malchut.
4: “שֶׁשָּׁם עָלוּ שְׁבָטִים, שִׁבְטֵי-יָהּ–עֵדוּת לְיִשְׂרָאֵל: לְהֹדוֹת, לְשֵׁם יְהוָה”
“To which the tribes go up, even the tribes of YH (יה)– A testimony for Israel– To give thanks to the name of YHVH.”
The Zohar explains that the twelve tribes are the aspect of the 12 borders of Zeir Anpin (See DZ 1677 http://dailyzohar.com/daily-zohar-1677/). They are the ‘connectors’ between Malchut and the upper three Sefirot that are represented by the two letters YH of the YHVH name.
The verses describe the tribes as the tribes of YH (שִׁבְטֵי-יָהּ) and the testimony is in the way the families of the tribes were called at the time of the counting in the book of Numbers.
The three names we brought as example show the letter H at the beginning of the word and the letter Y at the end.
God provided us with the protection that we need. All we have to do is elevate ourselves and give thanks to the YHVH name.