The Cambridge History of India, Vol. IV: The Mughul Period v4.c21.s1.26

v4.c21.s1.26

This dispute was interrupted by the third³ invasion of India by Ahmad Shāh Abdālī, who crossed the frontier at the end of 1751, and at the same time sent an envoy to Delhi, demanding the cession of the Punjab and Multān. Mu‘in-ul Mulk the governor withstood the invader for four months and would probably have compelled him to retire had it not been for the treachery of Ādīna Beg Khān, who suggested an ill-timed *sortie*, of which notice was given to the invaders, and which failed.