Hebrews 3:15
While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.
Hebrews 4:7
Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
Hebrews 12:26
Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven.