If thou return to the Almighty - Assuming that he was an impenitent sinner, and wholly unreconciled to him.
Thou shalt be built up - A figure taken from building up a house, in contradistinction from pulling one down, and denoting that he would be prospered and happy.
Thou shalt put away iniquity - Rosenmuller, Good, Noyes, and Wemyss, suppose correctly, as it seems to me, that the word “if” is to be understood here to complete the sense - “if thou shalt put away iniquity.”
From thy tabernacle - From thy tent, or dwelling.