Genesis 15:15

And thou shall go to thy fathers in peace
Or die, which is a going the way of all flesh, to a man's long home, out of this world to another, to the world of spirits, to those that are gone before them; which is no inconsiderable proof of the immortality of the soul. Jarchi infers from hence, that Terah, Abram's father, was a penitent, and died a good man, and went to heaven, the place and state of the blessed, whither Abram should go at death; but the phrase of going to the fathers is used both of good and bad men: it is moreover said of Abram, that he should go in peace; being freed from all the fatigues of his journeying from place to place in his state of pilgrimage, and not living to see the afflictions of his posterity, and to have any share in them; and dying in spiritual peace, in tranquillity of mind, knowing in whom he had believed, and where his salvation was safe and secure, and whither he was going; for a good man dies with peace of conscience, having his sins freely forgiven, and he justified from them by the righteousness of the living Redeemer, and enters into eternal peace, see ( Psalms 37:37 ) :

thou shall be buried in a good old age;
this signifies that he should live long, see many days and good ones, enjoy much health and prosperity, continue in the ways of truth and righteousness to the end, and come to his grave like a shock of corn fully ripe, and fit for an other world; and that he should have a decent interment in the land of Canaan, where he purchased a burial place, and which was a pledge and earnest of the future possession of it by his seed, the thing here promised.