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.
4With his shoulders he shall make shadow to thee; and thou shalt have hope under his feathers. His truth shall (en)compass thee with a shield; (With his feathers he shall make a shadow for thee; and thou shalt have hope under his wings. His faithfulness shall surround thee like a shield.)
5thou shalt not dread of the night’s dread. Of an arrow flying in the day, (Thou shalt not fear the terror in the night; nor an arrow flying in the day.)