GATHERED UNTO HIS PEOPLE

Genesis 25:8-10
8 Then Abraham gave up the ghost, and died in a good old age, an old man, and full of years; and was gathered to his people.

9 And his sons Isaac and Ishmael buried him in the cave of Machpelah, in the field of Ephron the son of Zohar the Hittite, which is before Mamre;

10 The field which Abraham purchased of the sons of Heth: there was Abraham buried, and Sarah his wife.
KJV

Genesis 25:17
17 And these are the years of the life of Ishmael, an hundred and thirty and seven years: and he gave up the ghost and died; and was gathered unto his people.
KJV

Genesis 35:29
29 And Isaac gave up the ghost, and died, and was gathered unto his people, being old and full of days: and his sons Esau and Jacob buried him.
KJV

Genesis 49:33
33 And when Jacob had made an end of commanding his sons, he gathered up his feet into the bed, and yielded up the ghost, and was gathered unto his people.
KJV

Numbers 20:24
24 Aaron shall be gathered unto his people: for he shall not enter into the land which I have given unto the children of Israel, because ye rebelled against my word at the water of Meribah.
KJV

Numbers 20:26
26 And strip Aaron of his garments, and put them upon Eleazar his son: and Aaron shall be gathered unto his people, and shall die there.
KJV

Deuteronomy 32:50
50 And die in the mount whither thou goest up, and be gathered unto thy people; as Aaron thy brother died in mount Hor, and was gathered unto his people:
KJV

gathered unto his people: an idiomatic Euphemism for death and burial.
From the companion Bible