How he sware
shaba` (shaw-bah')
propr. to be complete; to seven oneself, i.e. swear (as if by repeating a declaration seven times)
unto the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
and vowed
nadar (naw-dar')
to promise (pos., to do or give something to God) -- (make a) vow.
unto the mighty
'abiyr (aw-beer')
mighty (spoken of God) -- mighty (one).
God of Jacob
Ya`aqob (yah-ak-obe')
heel-catcher (i.e. supplanter); Jaakob, the Israelitish patriarch -- Jacob.