Employee termination from job after he is back from the ESIC leave?

Can any one solve my query for the employee who came back from the ESIC leave he is not able to work in my company so what can i do for this. He is not able to do my company work. this i have to join him but what is next to to terminate him from job because he is not qualify for this job.

Please get it certified from ESI doctor that he is unable to work & till he becomes fit ask him to again go on Sick Leave under ESI / LOP either may be the case.

As per law, if he is not able to perform such job, company should assign other job which he can perform OR other way is to make some settlement with him for putting resignation.