NET
15 As it says, “Oh, that today you would listen as he speaks! Do not harden your hearts as in the rebellion.”
Darby
15 in that it is said, To-day if ye will hear his voice, do not harden your hearts, as in the provocation;
KJV
15 While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.