Those who live in the shelter of the Most High will find rest in the shadow of the Almighty. This I declare about the Lord: He alone is my refuge, my place of safety; he is my God, and I trust Him.
Psalm 91: 1-2
There are many good quotes of reassurance, from scripture. Whenever we are afraid, anxious, worried or feel unease, we only need to read this quote and take confidence in it. All fears, anxieties, worries and uneasiness will pass us by. We only need to be still and trust in Him.