4He will shield/protect you like a bird shields/protects its chicks MET with/under her wings. You will be safe ◄in his care/because he takes care of you►. His faithfully doing what he has promised is like a shield MET that will protect you.
5You will not be afraid of things that happen during the night that could ◄terrorize you/cause you to be very afraid►, or of arrows that your enemies will shoot at you during the day.
6You will not be afraid of ◄plagues/widespread sicknesses► that demons cause when they attack people at night, or of other evil forces that kill people at midday.