In 1398, Timur invaded northern India, attacking the Delhi Sultanate ruled by Sultan Nasir - ud - Din Mahmud Shah Tughluq of the Tughlaq Dynasty. He was opposed by Ahirs and faced some reversals from the Jats, but the Sultanate at Delhi did nothing to stop him. After crossing the Indus river on 30 September 1398, he sacked Tulamba and massacred its inhabitants. Then he advanced and captured Multan by October.
who was the sultan of delhi when the taimur invaded the city
Nasir - ud - Din Mahmud Shah Tughluq of the Tughlaq Dynasty