The vein of my heart awaits your rain of grace, for in the cups of intoxication, the wine of the minstrel is gone.

This couplet speaks of profound, desperate longing. The poet says that the very veins of his heart are waiting for the rain of your grace. He feels that even when he indulges in the intoxicating cups of wine (Ajm), he can no longer find the inspiration or joy (May-e-Mughana) that once sustained him. It's a plea for divine or beloved mercy, suggesting that earthly pleasures are empty without the object of his devotion.