“And whoever receives one little child like this in My name receives Me. But whoever causes one of these little ones who believe in Me to sin, it would be better for him if a millstone were hung around his neck, and he were drowned in the depth of the sea.” Matthew 18:5-6.
Psalm 91 is one of sixteen psalms that are called Messianic Psalms; they are prophetic psalms revealing the Messiah (Christ Jesus) to come. Psalms 2, 8, and 22 are three that you may know.