The first word is, as it is with the two previous psalms, the word praise (Praise the Lord!).

Thereafter this call is repeated in greater detail toward those dwelling in heaven: Praise the Lord from the heavens; praise him in the heights! The poetic form is parallelism, meaning that the second part repeats the first part in different words. From this it becomes clear that the heights stands parallel to the heavens. So, we may conclude that the realms above the earth are being addressed here. The praise must resound from the heavens and in the heights. This is where the Lord resides, and this is how glory is being rendered to him in that high place.

Another translation translates the heights with the same word that the angels used when praising God in the fields of Bethlehem when Jesus was born, as in Luke 2:14, “Glory to God in the highest.