Here's an example of sad poetry in Urdu:
"Udasi Ka Safar"
Ankhen bheegi bheegi si hain,
Aankhon mein nami hai,
Yaadein teri meri,
Ab kahin kho gayi hain.
Pyar ke safar mein,
Hum the bethae huay,
Lekin ab to yeh manzar,
Kuchh aur hi hai.
Teri yaadon ke saaye mein,
Main hoon akela,
Dard hai gehra,
Dil ko takleef hai.
Main chahta hoon,
Ke yeh udasi khatam ho jae,
Lekin yeh dard,
Mere dil se kabhi nahi jae ga.
So main chupke se ro loon,
Yeh udasi ka safar,
Main chahta hoon,
Ke tum mere paas ho.