Psalms 99:9

רוֹמְמוּ ה' אֱלֹקינוּ וְהִשְׁתַּחֲווּ לְהַר קָדְשׁוֹ כִּי קָדוֹשׁ ה' אֱלֹקינוּ

Exalt Hashem our G-d and prostrate towards His holy mountain because Hashem our G-d is holy.

Continuing pesukei d’zimra, the morning verses of praise

What’s the connection between prostrating towards the Temple mount and G-d being holy? The Radak explains that when people see the awe-inspiring Temple and are impressed by its holiness and majesty, they will start to comprehend how supremely holy and awesome G-d Himself must be.