The Pharaoh regarded himself as deity and a super natural being. He did not respond to Prophet Moses (Musa) message (May Peace Be Upon Him Prophet Musa), inviting him to believe in One God and allow the Israelites to leave Egypt with Moses. The Pharaoh would threaten and cause problems when Prophet Moses (Musa) tried passing the message to him. This arrogant attitude of the Pharaoh lasted until he was faced with the threat of death through drowning.
At the time when the Pharaoh’s army were chasing Prophet Moses (Musa) and his people, God parted the water allowing Prophet Moses (Musa) and his people through, but when the Pharaoh tried going through, he drowned and whilst drowning he did accept the message but it was too late. The Qur’an relates that the Pharaoh immediately turned to belief when faced with the almighty Allah’s punishment. I would recommend you read up on Prophet Moses (Musa). It’s a very interesting read.
The Pharaoh is mentioned within the Torah, Bible and Qur’an, but the event of what happened may differ.
Verse from the Qur’an:
“And We took the Children of Israel across the sea, and Pharaoh and his soldiers pursued them in tyranny and enmity until, when drowning overtook him, he said, “I believe that there is no deity except that in whom the Children of Israel believe, and I am of the Muslims – Now? And you had disobeyed [Him] before and were of the corrupters? ” (Quran 10:90-91)
and the next verse
“But We will this day deliver you with your body that you may be a sign to those after you, and most surely the majority of the people are heedless to Our communications.” (Qur’an, 10:92)
Other translations of the above verse:
Sahih International: So today We will save you in body that you may be to those who succeed you a sign. And indeed, many among the people, of Our signs, are heedless
Pickthall: But this day We save thee in thy body that thou mayst be a portent for those after thee. Lo! most of mankind are heedless of Our portents.
Yusuf Ali: “This day shall We save thee in the body, that thou mayest be a sign to those who come after thee! but verily, many among mankind are heedless of Our Signs!”
Shakir: But We will this day deliver you with your body that you may be a sign to those after you, and most surely the majority of the people are heedless to Our communications.
Muhammad Sarwar: We will save your body on this day so that you may become evidence (of Our existence) for the coming generations; many people are unaware of such evidence.”
Mohsin Khan: So this day We shall deliver your (dead) body (out from the sea) that you may be a sign to those who come after you! And verily, many among mankind are heedless of Our Ayat (proofs, evidences, verses, lessons, signs , revelations, etc.).
Arberry: So today We shall deliver thee with thy body, that thou mayest be a sign to those after thee. Surely many men are heedless of Our signs.’
The information that Pharaoh’s corpse would serve as a sign for later generations may be regarded as an indication that his body would not decay. In all likelihood, Pharaoh’s body floated to shore after being drowned, was found and mummified, and then carried to a previously prepared burial chamber. Allah knows best. You will find lots of Scholars from different religions who believe the body has been discovered and is that of Ramesses ii, where as there are people who believe not and the ones discovered are not that of the Pharoah from Moses (Musa) time. Allah knows best whether one of the body’s is that of the Pharoah of Moses time. Was it discovered by the people of that time and a sign for those people of the past, or have our Scientists got it wrong and one of the discovered bodies is that of the Pharaoh from Moses (Musa) time. Was the body found but not publicly announced. Allah knows best, but the verse within the Qur’an can not be ignored.