שִׁ֥יר הַֽמַּעֲל֗וֹת לְדָ֫וִ֥ד שָׂ֭מַחְתִּי בְּאֹמְרִ֣ים לִ֑י בֵּ֖ית יְהוָ֣ה נֵלֵֽךְ׃
A Song of Ascents; of David. I rejoiced when they said unto me: 'Let us go unto the house of the LORD.'
Read kabbalistic (mystical) interpretation of Psalms 122:1: and classical mystical sources.