'Hearts' in the Bible

Judah and Israel were as great in number as the sand by the seaside, and they took their food and drink with joy in their hearts.

Said, O Lord, the God of Israel, there is no God like you in heaven or on the earth; keeping faith and mercy unchanging for your servants, while they go in your ways with all their hearts.

"LORD God of Israel, there is no one like you, God in heaven above or on the earth below, who watches over his covenant, showing gracious love to your servants who live their lives in your presence with all their hearts. It is you, LORD God, who have kept your promise to my father, your servant David, that you made to him. Indeed, you made a commitment to my father David and then personally fulfilled what you had promised today.

Then hear thou in heaven thy dwelling place, and forgive, and do, and give to every man according to his ways, whose heart thou knowest; (for thou, even thou only, knowest the hearts of all the children of men;)

if they turn their hearts back to you in the land where they have been taken captive, repent, and pray to you even if they do so in the land of their captivity confessing, "We have sinned, we have committed abominations, and practiced wickedness,'

That he may incline our hearts unto him, to walk in all his ways, and to keep his commandments, and his statutes, and his judgments, which he commanded our fathers.

Therefore, your hearts are to be wholly devoted to the Lord our God, to walk in His statutes and to keep His commandments, as [you are doing] today.”

On the fifteenth day he sent the people away. So they blessed the king and went home to their tents rejoicing and with joyful hearts for all the goodness that the Lord had done for His servant David and for His people Israel.

from the very nations of whom the Lord said to the Israelites, “You shall not associate with them, nor shall they associate with you, for the result will be that they will turn away your hearts to follow their gods.” Yet Solomon clung to these in love.

If these people keep going up to Jerusalem to offer sacrifices to the LORD there, the hearts of these people will return to their lord, King Rehoboam of Judah. Then they'll kill me and return to Rehoboam, king of Judah!"

Answer me, Lord! Answer me so that this people will know that You, Yahweh, are God and that You have turned their hearts back.”