Salat-e-Khasoof is performed at the occasion of _____?

Salat-e-Khasoof is performed at the occasion of _____?

نمازِ خسوف ______ کے موقع پر ادا کی جاتی ہے؟
Explanation

Salat-e-Khasoof is performed on the occasion of the Lunar eclipse (چاند گرہن)

It occurs in two or Four zakaah prayer 

It is a Nafli, not an obligatory prayer.


Additional information:

Salat ul  Kusuf (نمازكسوف)is a two or Four-zakaah prayer performed during a solar eclipseسورج گرہن,