They — That constantly abide in thy house; the priests and Levites, or other devout Jews who were there perpetually, as Anna, Luke 2:36-37. They will — They are continually employed in that blessed work.
Related Commentaries of Psalms 84:4
Psalms 84:4
4 Blessed are they that dwell in thy house: they will be still praising thee. Selah.