When Israel was a child, then I loved him, and called my son out of Egypt. Driver uses this verse to exemplify the principle that when the reference is to what is past or certain, rather than to what is future or indefinite, we find the predicate or the apodosis introduced by וַּ, though not with nearly the same frequency as לperfect and vav causes
The life of a nation has its stages of rise, progress, and development, like the life of an individual man. The prophet goes back to that early period when the national life of Israel was in its infancy; it was then that a few patriarchs who had gone down to sojourn in Egypt were becoming a people; the predicate precedes, to emphasize, that early day when Israel became God's peculiar people. The vav marks the apodosis recording God's love in choosing that people, calling them into the relation of sonship, and delivering them out of Egypt. Thus Kimchi says, "When Israel was vet a child, i.e. in Egypt, then I loved him, therefore I am more angry with them than with the rest of the nations; for from their youth onward I have loved them, and delivered them out of the bands of their enemies. But when they transgress my commandments it is incumbent on me to chastise them as a man chastises his son."
(a) the first part of the verse to Israel and the second part typically to the history of Messiah's childhood, in whom that of Israel reached its completeness. Rather
(b) the verse was applied typically to Israel, and to Jesus as the antitype; to the former primarily, and to the latter secondarily. Thus the head and the members are comprehended in one common prediction.