'With All Your Heart' in the Bible

And Samuel spake unto all the house of Israel, saying, If, with all your heart, ye are returning unto Yahweh, then put away the gods of the foreigner out of your midst, and the Ashtoreths - and firmly set your heart towards Yahweh, and serve him, alone, that he may deliver you out of the hand of the Philistines.

Then said Samuel unto the people - Do not fear, ye, have done all this wrong, - nevertheless, do not turn aside from following Yahweh, but serve Yahweh, with all your heart;

Only, revere Yahweh, and serve him in truth, with all your heart, - for see, what great things he hath done with you.