King James Version
And if thou wilt walk in my ways, to keep my statutes and my commandments, as thy father David did walk, then I will lengthen thy days.English Standard Version
And if you will walk in my ways, keeping my statutes and my commandments, as your father David walked, then I will lengthen your days."New International Version
And if you walk in my ways and obey my statutes and commands as David your father did, I will give you a long life."