Hebrews 3:7-8, 15

Therefore, just as the Holy Spirit says, “TODAY IF YOU HEAR HIS VOICE, DO NOT HARDEN YOUR HEARTS AS [your fathers did] IN THE REBELLION [of Israel at Meribah], ON THE DAY OF TESTING IN THE WILDERNESS

while it is said, “TODAY [while there is still opportunity] IF YOU HEAR HIS VOICE, DO NOT HARDEN YOUR HEART, AS WHEN THEY PROVOKED ME [in the rebellion in the desert at Meribah].” [Ps 95:7, 8]