Psalm 95:7-8 Ps. 95:7-8
7 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, 8 Harden not your heart, as in the provocation, and as in the day of temptation in the wilderness:
Hebrews 4:7 Heb. 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.
(Quotation)