1 Thessalonians 5:5

The present age is utter night (שֶׁכֻּלּוֹ לַיְלָה), as contemporary rabbis taught; the age to come is all day. Meantime faith is to be held fast through this night (cf. passages quoted in Schlatter's die Sprache u. Heimat des vierten Evangelisten, 17, 18). υἱοὶ φ. καὶ ὑ. ἡμέρας is a stronger and Semitic way of expressing the thought of “belonging to” (cf. 1 Thessalonians 5:8).