Wait for four nights; keep the lantern hanging at the window.

This couplet speaks of hopeful anticipation. It's a message to someone waiting, asking them to remain patient for four nights. As a symbol of this unwavering wait and perhaps to light the way for a return, they are told to keep a lantern hanging by the window. It evokes a feeling of longing, a persistent hope, and a silent promise of reunion, with the lantern serving as a beacon through the darkness.