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."
Cross References (ranked by relevance)
Psalm 95:7
20
For he is our God; and we are the people of his pasture, and the sheep of his hand. To day if ye will hear his voice,
Hebrews 3:15
While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.
Matthew 22:43
He saith unto them, How then doth David in spirit call him Lord, saying,