Lyrics:

Selah is a word used seventy-four times in the Hebrew Bible—seventy-one times in the Psalms and three times in Habakkuk.
The meaning of the word is not known, though various interpretations are given below.
It is probably either a liturgico-musical mark or an instruction on the reading of the text, something like 'stop and listen.'
Selah can also be used to indicate that there is to be a musical interlude at that point in the Psalm.
The Amplified Bible translates selah as 'pause, and think of that.'
It can also be interpreted as a form of underlining in preparation for the next paragraph.