Psalm 121 is one of my favorites, and has a lovely lullaby-like tune, but it can also be sung to the tune of Auld Lang Syne...which is good, because everyone knows that one, and we can all sing together!
I to the hills will lift mine eyes,
from whence doth come mine aid.
My safety cometh from the Lord,
who heav’n and earth hath made.
Thy foot he’ll not let slide,
nor will he slumber that thee keeps.
Behold, he that keeps Israel,
he slumbers not, nor sleeps.
The Lord thee keeps, the Lord thy shade
on thy right hand doth stay:
the moon by night thee shall not smite,
nor yet the sun by day.
The Lord shall keep thy soul; he shall
preserve thee from all ill.
Henceforth thy going out and in
God keep for ever will.