'Heart' in the Bible

Don't oppress the widow, nor the fatherless, the foreigner, nor the poor; and let none of you devise evil against his brother in your heart.'

Ephraim will be like a mighty man, and their heart will rejoice as through wine; yes, their children will see it, and rejoice. Their heart will be glad in Yahweh.

The chieftains of Judah will say in their heart, 'The inhabitants of Jerusalem are my strength in Yahweh of Armies their God.'