Firishta's History (Gulshan-i Ibrāhīmī) 92.4.6

92.4.6

but if he should find this impossible, he recommended him, by all means, to induce the neighbouring rajas to espouse his cause, and to prevail on them to join his son with their followers, in order to harass the Mussulmans, by cutting off their supplies, and by making frequent night attacks. He promised, moreover, to issue his orders to all his vassals to assist him, though he could not rely on their obedience. Velapa Ray, by this answer, was reduced to despair, yet, in compliance with the advice it contained, he prevailed on some chiefs to join his son; who acted with such vigour, that grain became scarce in the King's camp, which was molested every night by bands of robbers and assassins, who did much execution. The infantry of the Carnatic, who value their lives but little, were quite naked, and had their bodies anointed with oil, to prevent their being easily seized: thus prepared, they entered the tents at night and stabbed the soldiers, while sleeping, without mercy. Every night numbers were killed by them in this treacherous manner; and so great a dread and discontent prevailed among the troops, that they were near forcing the King to raise the siege. At length Moostufa Khan provided a remedy, both to ward off famine and to repel the nightly murderers.