Charles H. Spurgeon on Psalms 91:6

The putrid plague fever often comes on in the night while the patient is asleep; the solstitial disease seizes in heat of harvest upon a man in open air, and cuts him off, perhaps ere evening. It is safety from perils like these that is spoken of. All these blessings are derived from and rest on (Ps 91:1) the position of Him that claims them "under the covert of the Most High." Andrew A. Bonar.