'Soul' in the Bible

If they return to thee with all their heart and with all their soul in the land of their captivity, whither they have carried them captives, and pray toward their land, which thou gavest unto their fathers, and toward the city which thou hast chosen, and toward the house which I have built for thy name:

And they entered into a covenant to seek the LORD God of their fathers with all their heart and with all their soul;

And the king stood in his place, and made a covenant before the LORD, to walk after the LORD, and to keep his commandments, and his testimonies, and his statutes, with all his heart, and with all his soul, to perform the words of the covenant which are written in this book.