There is a song by Damian Marley that refers to "The sleeping sons of Jacob".
I looked up 'Sons of Jacob' on Wikipedia and now understand them to represent the 12 tribes of Israel.
Here's an example of "sons of Jacob" that might have broader application:
15 Thou art the God that doest wonders; Thou hast made known Thy strength among the peoples. 16 Thou hast with Thine arm redeemed Thy people, the sons of Jacob and Joseph. Selah Psalms 77:15-16
Here's an example of the "children of Israel" that might refer to a larger group than just Jews:
7 He made known His ways unto Moses, His doings unto the children of Israel. Psalms 103:7
Is it possible to read "sons of Jacob/Israel" as "spiritual offspring"?