FWP:
SETS
BONDAGE: {1,5}
SOUND EFFECTS: {26,7}
Here the address is to 'you' in the intimate tuu , and the bitter, cynical tone suggests that the lover is either counseling himself, or giving heartfelt, candid advice to some younger friend. The colloquial use of ma((luum , as Josh observes, gives an extra punch; for more on this idiomatic usage see {4,3}.
The first line plays with images of the harvest. The word ;haa.sil itself, though it often means merely the abstract 'result', can refer literally to the 'harvest'; for an example of wordplay involving both meanings, see {12,1}. When we also see that it is to be 'gathered' [faraaham karnaa], we have a sense of grain being brought in. Brought in 'with lament' [bah naalah], of course, since it's the harvest of heart-boundness, and we know it will somehow be lost or blighted.
But not until we are vouchsafed the second line-- and under mushairah performance conditions, there would certainly be some delay-- do we realize that the lament isn't just a reaction to the harvest, but itself constitutes the harvest. The 'lament' is placed at the beginning of the first line, and the 'sound' as late as possible in the second line, so that (in the best mushairah style) the full realization is delayed as long as can be managed.
And in between we have-- the chains. As with the laments, we're taken by surprise. In the first line, dil-bastagii registers only as a common expression for the state of being in love. Only when we see the zanjiir do we recall its literal meaning of 'heart- boundness', a form of bondage. And then we realize that the elegant wordplay of the 'house of chains' with 'heart-boundness' is at the center of the verse. If the lover chains up his heart, the only 'harvest' that he 'gathers' will be laments, his only 'wealth' will be the sound of the chains themselves as they screech and groan with his every movement. The chains on his heart are thus both themselves a lament, and a cause for lament to the lover. (Of course, as Josh notes, madmen were often chained up in any case.)
The verse is unusually full of conspicuously placed long aa sounds. Perhaps they help to provide the .sadaa of the naalah .
On the possibilities of juz , see {101,1}.
Nazm:
He has constructed heart-boundness and relationship of temperament as chains. He says, 'If you engage in heart-binding, then adopt the practice of lament as well, for in a house of chains, the only wealth and property is the sound of mourning. His intention is the scorn of the world. (83)
== Nazm page 83