Analysis of information sources in references of the Wikipedia article "نصیرالدین همایون" in Persian language version.
He … turned toward Qandahar where his brother Kamran was in power, but he received no help and had to seek refuge with the Shah of Persia.
Babar established good relations with them [the Ghakhars] and hereafter they always sided with the Mughals. Sher Shah Suri therefore determined to crush the Ghakhars and built a fort at Rohtas;