singh is king ji

It is Gurbani -- and Sara has given the linguistic explanation for this. Why not post an example of where you saw this with the surrounding context so we can take a look and see what might be going on? I sounds to me as if someone did not understand the idea of the oblique form as Sara explained.

I had a second thought. The person may be trying to say Guru's Bania -- but unsure of the 's rule. This is very hard when learning English.

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ਮਨ ਕਰਹਲਾ ਗੁਰ ਗੋਵਿੰਦੁ ਸਮਾਲਿ ॥ man karehalaa gur govindh samaal O camel-like mind, dwell upon the Guru and the Lord of the Universe.