'Soul' in the Bible

yea, they have turned back unto Thee with all their heart, and with all their soul, in the land of their captivity, whither they have taken them captive, and they have prayed the way of their land that Thou hast given to their fathers, and of the city that Thou hast chosen, and of the house that I have built for Thy name:

and they enter into a covenant to seek Jehovah, God of their fathers, with all their heart, and with all their soul,

And the king standeth on his station, and maketh the covenant before Jehovah, to walk after Jehovah, and to keep His commands, and His testimonies, and His statutes, with all his heart, and with all his soul, to do the words of the covenant that are written on this book.