Poetry: Hafez
One of my favorite verses from the first ghazal of Hafez -- "Ke eshgh aasaan nomood aval vali oftaad moshkel-haa":

Shab e taareek o beem e moj o gerdaabi chenin haael Kojaa
daanand haal e maa sabok-baar-aan'e saahel-haa

And here is a lesser known 2-beiti from him sort of in the style of Omar Khayyam:

Gar hamcho man oftaadeye in daam shavi
Ey bas ke kharaab baade o jaam shavi

Maa aashegh o mast o rend o aalam soozim
Baa maa maneshin agar na badnaam shavi