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-reference
Hebrews 3:7 introduces the same Psalm quotation ('Today, if you hear his voice') repeated in Hebrews 4:7.
Hebrews 3:8 continues the Psalm quote, warning against hardening hearts as in the wilderness rebellion.
Hebrews 3:15 is the earlier citation of the same Psalm 95:7-8 quotation that this verse expands upon.
2 Samuel 23:2 affirms David spoke by the Spirit, confirming the divine origin of the Psalm quoted in Hebrews 4:7.
Psalm 95:7 is the original source of the quotation 'Today, if you hear his voice' used here.
2 Corinthians 6:2 declares 'now is the day of salvation' — directly echoing Hebrews' emphasis on hearing God's voice today.
In Matthew 22:43, David similarly speaks by the Spirit — reinforcing the inspired authorship of the psalm quoted here.
Mark 12:36 also has David speaking in the Holy Spirit, echoing the same tradition of Davidic authorship.
Acts 28:25 attributes Isaiah's words to the Holy Spirit, similar to how this verse says God spoke through David — a parallel on divine inspiration.
Romans 2:5 warns of storing up wrath by stubbornness — similar to Hebrews' warning not to harden hearts. Both call for immediate repentance.