He keepeth back
chasak (khaw-sak')
assuage, darken, forbear, hinder, hold back, keep (back), punish, refrain, reserve, spare, withhold.
his soul
nephesh (neh'-fesh)
a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
from the pit
shachath (shakh'-ath)
a pit (especially as a trap); figuratively, destruction -- corruption, destruction, ditch, grave, pit.
and his life
chay (khah'-ee)
age, alive, appetite, (wild) beast, company, congregation, life(-time), live(-ly), living (creature, thing), maintenance, + merry, multitude, + (be) old, quick, raw, running, springing, troop.
from perishing
`abar (aw-bar')
to cross over; used very widely of any transition (literal or figurative; transitive, intransitive, intensive, causative); specifically, to cover (in copulation)
by the sword
shelach (sheh'-lakh)
a missile of attack, i.e. spear; also (figuratively) a shoot of growth; i.e. branch -- dart, plant, put off, sword, weapon.