If I forget you, O Jerusalem,
let my right hand forget its skill!
let my right hand forget its skill!
Let my tongue stick to the roof of my mouth,
if I do not remember you,
if I do not set Jerusalem
above my highest joy!
if I do not set Jerusalem
above my highest joy!
Psalm 137:5-6
Same song, same performer. The first, shorter video is a live performance, the second is a video with photos of Jerusalem. The first performance, you might note, has slightly different pronounciation from the second one: it's the same as how some Jews say Shabbos and others Shabbat.
Both songs are performed by Shimon Craimer.