ESV: Their heart was not steadfast toward him; they were not faithful to his covenant.
NIV: their hearts were not loyal to him, they were not faithful to his covenant.
NASB: For their heart was not steadfast toward Him, Nor were they faithful with His covenant.
CSB: their hearts were insincere toward him, and they were unfaithful to his covenant.
NLT: Their hearts were not loyal to him. They did not keep his covenant.
KJV: For their heart was not right with him, neither were they stedfast in his covenant.
NKJV: For their heart was not steadfast with Him, Nor were they faithful in His covenant.