What is the one and only unpardonable sin?

Well why don’t see what God has to say about it. These are the scriptures I used for message.
James 4:17; Romans 6:23; Isaiah 13:11; Isaiah 59:2; Jeremiah 5:25; 1 John 1:8–10; John 3:17; First Timothy 2:4; Romans 8:1; Luke 7:47; John 3:16; 1 John 2:2; 2 Corinthians 5:21; 1 Timothy 1:15; Matthew 7:4–5; 1 Corinthians 6:9–10; Revelation 21:8; Romans 3:23; Mark 3:22–30; Matthew 12:22–32 Matthew 12:32; Matthew 12;Mark 3; Matthew 12:24; Mark 3:30; John 16:8; Hebrews 11:6; Acts 16:31; John 3:16; John 14:6; James 4:8; Romans 5:20; 1 Timothy 1:12–17; Hebrews 7:25; Isaiah 12:2.