Psalms 23:4
4 Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.
In the original: צלמות tsalmâveth H6757 — From H6738 and H4194; shade of death, that is, the grave (figuratively calamity): - shadow of death.
See also: Isaiah 41:10 · Psalms 118:6 · Psalms 138:7 · Isaiah 43:1