The book you read this in was published in 1891, when the history of Ancient Egypt was poorly understood. In the 123 years since it was written, the history of ancient Egypt has become much better known. From authentic Egyptian sources, we know that Egypt conquered Nubia, which is modern Sudan. They sent a diplomatic mission to Punt, which is in modern Yeman. The furthest east Egyptian armies ever went, was the Euphrates river, in modern Syria, during the reign of Tuthmosis III in the Late Bronze Age, or New Kingdom period of Ancient Egyptian history. There is no evidence that during the Old Kingdom, Egypt expanded any further east that Byblos, in modern Lebanon.
You could not find any more sources on this claim, that an ancient Egyptian pharaoh Osiris conquered the Punjab, because there is not a shred of evidence to back it up. Egypt is also one of the most intensively studied of all ancient civilizations. There were also the ancient Sumerians and Elamites between Byblos and the Punjab. The Sumerian city of Ur did have contact with the Indus valley civilization and it is conceivable that the Indus valley civilization might have heard about the Egyptian god of Osiris, but it is highly unlikely that the Egyptians ever conquered the Punjab.