Divrey Hayamim Bais 7:3

And when all the Bnei Yisroel saw how the eish came down, and the kavod HASHEM upon HaBeis, they bowed themselves with their faces to the ground upon the ritzpah (floor, pavement) and worshiped, and gave thanks to HASHEM, saying, Ki tov ki l'olam chasdo (For He is good; for His mercy endureth forever).