Some Jews as well as non - Israelites survived Jerusalem’s destruction in 607 B.C.E. We know of the Rechabites, Ebed - melech, and Baruch.
وَيَفْرَحُ صَفُّ إِرْمِيَا كَثِيرًا بِتَقْدِيمِ ٱلدَّعْمِ ٱلرُّوحِيِّ لِهذَا ‹ ٱلْجَمْعِ ٱلْكَثِيرِ › .‏