Sa'ad-e-Sīmīn, you let go of both things that I brought into your hands; and on your promise and oath, you betrayed my thoughts.

This profound couplet speaks of broken trust and the weight of promises. The poet says that while leaving the 'Saad-e-Seem' (the path/memory of the beloved) in the beloved's hands is easy, what truly hurts is forgetting the solemn vows and oaths taken. It's the betrayal of the promise, the abandonment of the sacred word, that causes the deepest pain and sorrow.