A sudden shift from the glory of Jerusalem to the harsh reality of captivity brings a displaced people to mourn by foreign waters. Though these events unfold during the Babylonian exile, King David foresaw them through Divine inspiration, prophesying the destruction of both the First and Second Temples [תורה תמימה, מצודת דוד, מאירי]. The lament is voiced by the Levite singers. Having been dragged into captivity, they faced the cruel demand of Nebuchadnezzar to perform the sacred Temple songs exactly as they once did on the platform in Jerusalem [רש״י, רד״ק, אבן עזרא, מצודת דוד, מאירי].
The specific setting by the water holds deep significance. The primary approach among commentators is that the exiles actively sought an isolated location far from the watchful eyes of their Babylonian captors, allowing them to grieve and weep in private [רד״ק, אבן עזרא]. Conversely, others suggest that, broken and exhausted from the brutal journey, the captives simply looked for a brief moment of rest and shade beneath the trees lining the water [מאירי, ביאור שטיינזלץ].
The act of sitting by these rivers reflects various facets of the exile experience. Many view this as a physical posture of mourning, shock, and humiliation, with the captives sitting low to the ground [רד״ק, אבן עזרא, מצודת דוד]. Others interpret this pause as a rare moment of mercy from their captors, who typically forced them to march without rest but temporarily allowed them to stop and mourn [אלשיך]. On a completely different level, this sitting represents a long-term settlement. Over time, the exiles achieved economic stability in Babylon, building homes and planting vineyards, resulting in a physically comfortable life [מלבי״ם].
Because of this physical comfort, their tears highlight a sharp contrast in their condition. While they may have hoped for physical rest by the river, memories of Jerusalem and the taunts of their enemies flooded their minds, turning their quiet moments into deep sorrow [מאירי]. Their weeping was not for lost material wealth, as they were well-established in their new land, but rather a pure, spiritual grief over the ruined Temple, the cessation of the holy service, and the departure of the Divine Presence [מלבי״ם].
This sorrow was intertwined with a complex sense of comfort. The Babylonian waters are associated with the Chebar river, where the prophet Ezekiel experienced visions revealing that God's heavenly court and the Divine Presence had followed the Israelites into exile. Discovering that God was with them provided a profound sense of peace, joy, and hope for future redemption. Yet, this very realization sparked bitter tears, as the exiles wept knowing that the Divine Presence was now suffering and enduring the pain of exile alongside them [אלשיך, חומת אנך].