Meaning
Which; whom; the oblique form of the interrogative 'kya/kaun'.
See it in the verse
Kis in Iqbal’s couplets
Khud badalte nahin Quran ko badal dete hain
Hue kis darja faqeehan-e-haram be-taufeeq
Hue kis darja faqeehan-e-haram be-taufeeq
They will not change themselves, so they reinterpret the Quran instead — how utterly bereft of grace the jurists of the sanctuary have become.
Justice · Awakening · Courage
Ishq ki tegh-e-jigar-dar uda li kis ne
Ilm ke haath mein khali hai niyam ai saqi
Ilm ke haath mein khali hai niyam ai saqi
Who has carried off love's brave, heart-piercing sword? Knowledge holds only an empty scabbard now.
Love · Action · Courage