This psalm is a monument of some time of great national calamity; but its allusions do not enable us to reach certainty as to what that calamity was. Two striking features of it have been used as clues to its occasion--namely, the designation of the nation as "Joseph," and the mention of the three tribes in ver. 2. Calvin, Delitzsch, Hengstenberg, and others are led thereby to regard it as a prayer by an inhabitant of Judah for the captive children of the northern kingdom; while others, as Cheyne, consider that only the Persian period explains the usage in question. The name of "Joseph" is applied to the whole nation in other Asaph psalms (lxxvii. 15; lxxxi. 5). It is tempting to suppose, with Hupfeld, that this nomenclature indicates that the ancient antagonism of the kingdoms has passed away with the captivity of the Ten Tribes, and that the psalmist, a singer in Judah, looks wistfully to the ideal unity, yearns to see breaches healed, and the old associations of happier days, when "Ephraim and Benjamin and Manasseh" encamped side by side in the desert, and marched one after the other, renewed in a restored Israel. If this explanation of the mention of the tribes is adopted, the psalm falls in some period after the destruction of the northern kingdom, but prior to that of Judah. The prayer in the refrain "turn us" might, indeed, mean "bring us back from exile," but may as accurately be regarded as asking for restored prosperity--an explanation which accords better with the rest of the psalm. We take the whole, then, as a prayer for the nation, conceived of in its original, long-broken unity. It looks back to the Divine purpose as expressed in ancient deeds of deliverance, and prays that it may be fulfilled, notwithstanding apparent thwarting. Closer definition of date is unattainable. The triple refrain in vv. 3, 7, 19, divides the psalm into three unequal parts. The last of these is disproportionately long, and may be further broken up into three parts, of which the first (vv. 8-11) describes the luxuriant growth of Israel under the parable of a vine, the second (vv. 12-14) brings to view the bitter contrast of present ruin, and, with an imperfect echo of the refrain, melts into the petitioning tone of the third (vv. 15-19), which is all prayer.