Which Alankar (figure of speech) is used in the following Doha?
"माला फेरत जुग भया, फिरा न मन का फेर।
कर का मनका डारि दे, मन का मनका फेर।"

In this Doha by Kabir Das, the word 'मनका' (Manka) is repeated with different meanings:
1. The first 'मनका' (कर का मनका) means the bead of a rosary/garland.
2. The second 'मनका' (मन का मनका) means the thoughts or feelings of the heart/mind.

When a word is repeated in a verse but carries a different meaning each time, it is an instance of Yamak Alankar.