Praise be to Allah, and peace and blessings be upon the Messenger of Allah. To proceed:
The people of Paradise will enter it in the most perfect form and finest appearance, in the form of their father Adam, peace be upon him. It has been authentically reported that the Prophet ﷺ said:
“Everyone who enters Paradise will be in the form of Adam, and his height will be sixty cubits.” Narrated by Al-Bukhari and Muslim.
As for the age of the people of Paradise, they will enter it in the age of youth and strength, around thirty-three years old, and they will not grow old afterward.
The Prophet ﷺ said:
“The people of Paradise will enter Paradise hairless, beardless, and kohl-eyed, at the age of thirty or thirty-three years.” Narrated by At-Tirmidhi, and authenticated by scholars.
The meaning of “hairless” (jurd) is that they will have no hair on their bodies, while “beardless” (murd) means young men without beards.
Thus, the people of Paradise will be in the most beautiful appearance and in the prime of youth and strength, and they will remain in their bliss without old age or weakness.
We ask Allah to make us among the people of Paradise and to grant us its blessings and His pleasure.
And Allah knows best.