The first Muslim incursions into the Deccan occurred during the reign of which Delhi Sultan?

The first Muslim military invasion into the Deccan took place in $1896\text{ CE}$ against Devagiri during the reign of Jalaluddin Khalji. The expedition was led by his nephew and son-in-law, Alauddin Khalji (who was the governor of Kara at the time), without the explicit permission of the Sultan.