John Gill Commentary Psalms 128:4

"Behold, thus shall the man be blessed That feareth Jehovah." — Psalms 128:4 (ASV)

Behold, that thus shall the man be blessed that fears the
Lord .
In the manner before described, and in the instances already given, as well as in the following; this is said to raise attention, and fix a sense of the blessedness of such persons; and who are further addressed, and pronounced happy, in the next verses.