 Humayun, following his defeat by Sher Shah Suri circa 1541 at Chausa (after which village the famous mango variety is named) near Kannauj fled to Delhi through Shamsabad.The Saiyyeds of Shamsabad provided boats for Humayun as the Ganges was in spate.Sher Shah was in hot pursuit and this help by the Saiyyeds made him furious.