Lakkhanasutta 1.12

On this it is said:

“Realizing for himself the horrors of death,

he refrained from killing other creatures.

By that good conduct he went to heaven,

where he enjoyed the fruit of deeds well done.

Passing away, on his return to here,

he obtained these three marks:

his stretched heels are abundant and long,

and like the Divinity, he’s straight and beautiful,
with well-formed limbs.

Fair of arm, youthful, of good posture and breeding,

his fingers are soft and tender and long.

By these three marks of an excellent man,

they indicated that the prince’s life would be long:

‘As a householder he will live long;

longer still if he goes forth, due to

mastery in the development of psychic power.

Thus this is the sign of long life.’”