Sforno on Numbers 23:10/ספורנו על במדבר כ״ג:י׳

1תמות נפשי מות ישרים, if I were to die now I do not mind, provided that it would be the death of the righteous who will pass over into another life.

2ותהי אחריתי כמוהו, so that my offspring be like that of the Israelites. The children of man and those who are the biological issue of him are known as אחריתו, [literally the ones who are following behind him. Ed.] We encounter the word אחרית in this sense in Psalms 109,13 תהי אחריתו להכרית, “may his posterity be cut off. We encounter it in this context also in Daniel 11,4 ולא לאחריתו, “but not for any of his posterity.”