John Gill

Turn us again, O Lord God of hosts,.... This is a repetition of Psa 80:3, in which may be observed an increase of the names or titles of the Divine Being: in Psa 80:3, it is only "O God"; in Psa 80:7 "O God of hosts"; and here, "Lord God of hosts"; some have thought that the doctrine of the Trinity is here suggested; which is a better thought than that of Jarchi's, who supposes that three captivities of Israel are pointed at: but as it follows, cause thy face to shine, and we shall be saved; it appears that this was the burden of their song, being in darkness and distress, that they might have the light of God's countenance, and therefore repeat it again and again. Next: Psalms Chapter 81