Psalm 121 is one of the most well-known Psalms in Judaism.  It has become a prayer for protection and is one of the fifteen Psalms referred to as “Psalms of Ascent.”  There are differing opinions concerning the purpose for which these particular Psalms were written. The most accepted viewpoint is that they were written for the pilgrimage of those going up to the House of the Lord in Jerusalem at Passover, Shavuot (Pentecost), and the Feast of Tabernacles.