Hebrews 3:7 provides the 'today' from Psalm 95 that Hebrews 3:13 then applies to mutual exhortation.

Hebrews 3:8 quotes the warning 'do not harden your hearts' — the basis for the command to exhort daily to avoid that same hardening.

Hebrews 10:25 commands gathering and encouraging one another — directly paralleling the exhortation in 3:13 to avoid being hardened by sin.

Hebrews 10:24 urges stirring up one another to love and good works — a practical expression of the daily exhortation in 3:13 to prevent hardening.

Hebrews 13:22 calls this letter a 'word of exhortation' — showing that the author's own writing fulfills the command to exhort one another.

1 Thessalonians 5:11 urges mutual encouragement and building up, a strong parallel to Hebrews' exhortation to prevent hardening.

1 Thessalonians 4:18 commands believers to encourage one another, directly echoing Hebrews' call for daily exhortation.

Ephesians 4:22 speaks of deceitful desires corrupting the old self, a close parallel to sin's deceit causing hardening in Hebrews.

Romans 7:11 personifies sin deceiving Paul, directly echoing the 'deceitfulness of sin' that leads to hardness in Hebrews.

1 Samuel 6:6 warns against hardening hearts like Pharaoh — the same concept Hebrews urges believers to avoid.

2 Thessalonians 2:10 warns that wicked deception leads to perishing — mirroring the deceitfulness of sin that hardens hearts away from salvation.

2 Corinthians 6:2 declares 'now is the day of salvation' — reinforcing the urgency of 'today' in exhorting one another before it's too late.

1 Corinthians 14:3 identifies prophecy's purpose as upbuilding, encouragement, and consolation — the same kind of edifying speech commanded in daily exhortation.

Romans 2:5 warns that a hard and impenitent heart stores up wrath — directly parallel to the danger of being hardened by sin's deceitfulness.

Acts 2:40 records Peter exhorting the crowd to save themselves from a crooked generation — a direct example of the exhortation commanded here.

Daniel 5:20 recounts Nebuchadnezzar's spirit being hardened by pride — a direct OT example of the hardening that sin's deceit produces.

Isaiah 55:6 urges seeking the Lord while He may be found — mirroring the urgency of 'today' in this call to exhortation before hearts harden.

Isaiah 48:4 depicts Israel's obstinate neck and iron forehead — a vivid image of spiritual hardness that parallels the hardening by sin's deceit warned against here.

Psalm 95:8 continues the warning 'do not harden your hearts' — the same admonition underlying Hebrews' exhortation.

Psalm 95:7 provides the 'today' and call not to harden hearts — Hebrews 3:13 directly draws from this psalm.

Nehemiah 9:16 recounts Israel stiffening their necks — the same hardened response Hebrews warns against.

2 Chronicles 36:13 describes Zedekiah hardening his heart — directly parallels the hardening from sin in Hebrews.

Exodus 7:13 records Pharaoh's heart being hardened — illustrating the hardening Hebrews warns against.

Acts 19:9 describes some becoming stubborn and refusing to believe — a case of hardened hearts that the daily exhortation aims to prevent.

John 3:19 explains that people loved darkness because their deeds were evil — illustrating the deceitfulness of sin that hardens hearts.

Malachi 3:16 shows the faithful speaking to one another about the Lord — a parallel to the mutual exhortation commanded here.

In 1 Thessalonians 2:11, Paul describes his fatherly exhortation of believers, mirroring the call to mutual encouragement in Hebrews.

James 1:14 shows sin enticing through desire — echoing the deceitfulness that hardens hearts in Hebrews.

2 Timothy 4:2 includes exhortation as part of preaching, broadening the context of Hebrews' daily mutual call to exhort.