sense to תשׁכח: oblivioni detur (lxx, Italic, Vulgate, and Luther), or a half-passive sense, in oblivione sit (Jerome); but the thought: let my right hand be forgotten, is awkward and tame. Obliviscatur me (Syriac, Saadia, and the Psalterium Romanum) comes nearer to the true meaning. תּשׁכּח is to be taken reflexively: obliviscatur sui ipsius, let it forget itself, or its service (Amyraldus, Schultens, Ewald, and Hitzig), which is equivalent to let it refuse or fail, become lame, become benumbed, much the same as we say of the arms of legs that they “go to sleep,” and just as the Arabic nasiya signifies both to forget and to become lame (cf. Gesenius, Thesaurus, p. 921b). La Harpe correctly renders: O Jerusalem! si je t'oublie jamais, que ma main oublie aussi le mouvement! Thus there is a correspondence between Psa 137:5 and Psa 137:6 : My tongue shall cleave to my palate if I do not remember thee, if I do not raise Jerusalem above the sum of my joy. אזכּרכי has the affixed Chirek, with which these later Psalms are so fond of adorning themselves. ראשׁ is apparently used as in Psa 119:160 : supra summam (the totality) laetitiae meae, as Coccejus explains, h.e. supra omnem laetitiam meam. But why not then more simply על כּל, above the totality? ראשׁ here signifies not κεφάλαιον, but κεφαλή: if I do not place Jerusalem upon the summit of my joy, i.e., my highest joy; therefore, if I do not cause Jerusalem to be my very highest joy. His spiritual joy over the city of God is to soar above all earthly joys.
Verses 7-9
The second part of the Psalm supplicates vengeance upon Edom and Babylon. We see from Obadiah's prophecy, which is taken up again by Jeremiah, how shamefully the Edomites, that brother-people related by descent to Israel and yet pre-eminently hostile to it, behaved in connection with the destruction of Jerusalem by the Chaldaeans as their malignant, rapacious, and inhuman helpers. The repeated imper. Piel ערוּ, from ערה (not imper. Kal from ערר, which would be ערוּ), ought to have been accented on the ult.; it is, however, in both cases accented on the first syllable, the pausal ערוּ (cf. כּלוּ in Psa 37:20, and also הסּוּ, Neh 8:11) giving rise to the same accentuation of the other (in order that two tone-syllables might not come together). The Pasek also stands between the two repeated words in order that they may be
