How can I evict / remove my brother-in-law from my property?

Hi, I am the absolute owner of the property in Karnataka, which comprises 1 house on the ground floor and 4 houses on the 1st floor. My brother in law stays in one of the houses on the first floor and the rest of the houses are tenanted. story: My brother-in-law was in difficult times and he approached my husband and requested to allow him to stay in one of the houses available in the building for rent, and my husband agreed and allowed him to stay there during his difficult times  rent free, there was no rental agreement nor any form of written consent given to him. Now, after 3 years when my husband asked him to vacate the property he made several excuses & delayed it and finally a couple of months ago, he refused to vacate boldly and made threats to us. He has been in possession for 4 years by now. This is not an inheritance property, it was purchased through the sale deed by my husband and later my husband gifted it to me via the registered gift deed and I hold the registered title deed and the Khata on my name. What is the easiest and quick way to kick him out of that house, any legal / court proceedings would it drag the matter for years? Appreciate your guidance. Thanks