God also says, “under the shadow of the Almighty is protection.”
Read further Psalm 91:1. Has anyone heard the term “me and my shadow…?” It was a song, but more importantly people can refer to a shadow in this reference as something (the shadow) as following or observing someone.
If you’re truly under the shadow of the Almighty, then you’re to be following His lead (Ex. 23:20) or observing Him (as in observing His commands, Deut.10:13; 1John 5:2). THIS will be your protection.