Allah appointed Adam عليه السلام as the first human being, prophet, and messenger.
Adam عَلَيْهِ ٱلسَّلَامُ was sent to earth from the heavens in 4004 BC, passed away in 3054 BC, and lived for 950 years. Prophet Muhammad ﷺ was born after 80 generations of Prophet Adam عليه السلام.
Prophet Adam's height was 60 cubits, as per a Hadith.–Sahih Muslim 2841
Prophet Adam عَلَيْهِ ٱلسَّلَامُ’s name appears 25 times in the Holy Quran in different locations. Prophet Adam عَلَيْهِ ٱلسَّلَامُ resided in Jannah for almost a century, as per Qisas al-Anbiya. Prophet Adam, according to Quran.
Children Of Prophet Adam
Three of the 240 sons and daughters of Prophet Adam عليه السلام are well-known.
The first daughter of Adam, born with Qabil, was Qalima.
Adam's first son, Qabil, was born when he was 64 years old. At the age of 77, Adam had Habil.
When Adam reached 130 years old, Prophet Sheeth عليه السلام was born.
The last children of Prophet Adam were twins named Abdul Mughees and Ummul Mughees.
Is the grave of Prophet Adam located in Sri Lanka?
According to At Tabari, Hazrat Adam عليه السلام passed away at the base of a mountain and was buried there. In his book, Omar Mahmood claims that the grave of Prophet Adam عليه السلام is located close to Jabal Abu Qubais in Makkah, Saudi Arabia.
The location of the grave of Hazrat Hawwa عَلَيْهِ ٱلسَّلَامُ in Jeddah also supports this. The burial site of Prophet Adam عليه السلام, Mount Abu Qubais, and the grave of Hawwa is only 70 km apart.
Many believe that Sri Lanka is home to the grave of Hazrat Adam عَلَيْهِ ٱلسَّلَامُ, as the first footprint of Prophet Adam عَلَيْهِ ٱلسَّلَامُ can be seen on Adam's Peak in Sri Lanka.
There is no legitimate basis or authentic information to support this claim. Furthermore, there is no knowledge of where the grave in Sri Lanka may be situated if it exists. Najaf, Iraq's Wadi Us-Salaam.
According to Abu Basir, he asked Imam Sadiq رحمة الله عليه where Ali ibn Abi Talib رَضِيَ ٱللَّٰهُ عَنْهُ was laid to rest.
He replied: At the grave of his father, Prophet Noah عَلَيْهِ ٱلسَّلَامُ.
Abu Basir inquired about the location of Prophet Noah's grave, and people claim it is in Kufa's masjid.
According to Imam Sadiq رحمة الله عليه, it's situated behind Kufa.
Source: Wasa’elul-Shia, vol. 14, pg. 386, hadith 1943
Prophet Adam عَلَيْهِ ٱلسَّلَامُ died, and within a few hundred years, the Great Flood happened, leaving only Prophet Noah’s ship to survive, which presented another problem. There's a chance the flood destroyed the grave.
Allah ﷻ is the only one who knows what is correct.