Heart that is not steadfast toward Him

Those whose hearts aren’t steadfast toward the Lord

And those who aren’t faithful in His covenant (Ps. 78:37)

Don’t keep His covenant, refuse to walk in His law

And forget His deeds and His miracles that He has shown them (vv. 10-11).

They still continued to sin and rebel against Him (v. 17).

And in their heart they put God to test and they spoke against God (vv. 18-19).

They satisfy their desire (v. 30)

And still sin and doesn’t believe in His wonderful works (v. 32).