יַחְלְמ֣וּ בְ֭נֵיהֶם יִרְבּ֣וּ בַבָּ֑ר יָ֝צְא֗וּ וְלֹא־שָׁ֥בוּ לָֽמוֹ׃
Their young ones wax strong, they grow up in the open field; They go forth, and return not again.
Read Jewish philosophical commentary on Job 39:4: and classical philosophical sources.