וַיִּגְוַ֨ע וַיָּ֧מָת אַבְרָהָ֛ם בְּשֵׂיבָ֥ה טוֹבָ֖ה זָקֵ֣ן וְשָׂבֵ֑עַ וַיֵּאָ֖סֶף אֶל־עַמָּֽיו׃
And Abraham expired, and died in a good old age, an old man, and full of years; and was gathered to his people.
Read kabbalistic (mystical) interpretation of Genesis 25:8: and classical mystical sources.