Psalms — Chapter 137

• The Zohar (II, 176b) presents this psalm as the anthem of exile — the soul's lament when the Shechinah has been expelled from Her dwelling and the Sitra Achra occupies the sacred space. The weeping by Babylon's waters is the release of holy sparks through tears, which flow back to Zion through underground spiritual channels the Klipot cannot detect.

• "How shall we sing Hashem's song in a foreign land?" — the Zohar (III, 180a) poses the central dilemma of exile: holy song requires holy space, and the Sitra Achra's territory corrupts the melody. The answer, the Zohar teaches, is that the refusal to sing is itself a form of spiritual resistance — denying the Klipot the entertainment they demand while preserving the sacred melodies for the redemption.

• "If I forget you, O Jerusalem, let my right hand forget its skill!" — the Zohar (I, 224a) reads this vow as the Tzaddik binding his Chesed (right hand) to the memory of Jerusalem (Malkhut). If the memory fades, the Chesed-channel closes, and the Tzaddik loses his primary spiritual power. Memory of Jerusalem is therefore not sentimental but functional — it is the maintenance of the Chesed-Malkhut connection.

• "Let my tongue stick to the roof of my mouth, if I do not remember you" — the Zohar (II, 255b) identifies the tongue stuck to the palate as the cessation of prayer — the spiritual death that follows the forgetting of Jerusalem. The tongue is the instrument of Malkhut's praise; its paralysis is the silencing of the Shechinah's voice. This vow ensures that the praise-weapon remains operational throughout exile.

• "O daughter of Babylon, doomed to be destroyed! Blessed shall he be who repays you with what you have done to us!" — the Zohar (III, 178a) identifies Babylon as the primary Klipah of confusion and captivity. The repayment (Yeshalem) is not human vengeance but the divine Midah Keneged Midah that returns the Sitra Achra's aggression upon itself. The one who dashes the infants against the rock is, in the Zohar's reading, destroying the Klipot's next generation before it matures.

• Megillah 29a records the Talmud's most powerful teaching on exile theology: the Shekhinah went into Babylon with Israel — "By the rivers of Babylon" (verse 1) is not only the address of the exiles but the address of God, Who chose captivity alongside His people rather than sovereignty without them. The divine Presence was not left in the ruins of the Temple; it was carried in the hearts of those who wept.

• Berakhot 3b records that God Himself weeps at the exile — the Talmud describes God as roaring like a lion twice per night over the destruction of the Temple, making verse 1 (sitting down and weeping) the human echo of a divine grief. The Sitra Achra's greatest apparent victory — the destruction of God's house — is simultaneously the revelation of God's deepest covenant love.

• Sanhedrin 92a links hanging the harps on the willows (verse 2) to the Talmudic teaching that prophecy departs in sorrow — the covenant warrior cannot operate at full spiritual capacity in exile conditions, and this is not weakness but the appropriate response to the Shekhinah's own diminishment. The harp will be taken down again when the divine Presence is restored.

• Sotah 48b connects "How shall we sing the Lord's song in a foreign land?" (verse 4) to the Talmudic tradition that the songs of ascent fell silent after the Temple's destruction — the Sitra Achra's strategy is to silence the spiritual warriors through displacement, and "forgetting Jerusalem" (verse 5) is the spiritual death the adversary seeks.

• Sanhedrin 104a records the Talmudic debate over the psalm's closing verses against Edom and Babylon — the Talmud accepts these as the cry of the Shekhinah itself against the powers that orchestrated the exile, establishing that the exile's end is not a human political event but the divine Presence reclaiming the territory from which it was driven, and the rivers of Babylon will run in the other direction.