What do these solemn words portend

What do these solemn words portend?
A gleam of hope when life shall end:
“Thou and thy sons, tho’ slain, shall be
To-morrow, in repose with me!”
Not in a state of hellish pain,
If Saul with Samuel doth remain,
Not in a state of damn’d despair,
If loving Jonathan is there!

Hymnal/Album: Originally titled “To-morrow shalt thou and thy sons be with me.”—[I. Sam.] xxviii. 19. Introduced in Charles Wesley, Short Hymns on Select Passages of the Holy Scriptures, Vol. 1 (Bristol: Farley, 1762). Published in The Poetical Works of John and Charles Wesley, Collected and Arranged by G. Osborn, Vol. 9 (London: Wesleyan-Methodist Conference Office, 1870), page 163.
Publishing: Public Domain