The Bible does not state that there are ‘7 deadly sins’.
‘7 deadly sins’ is a list compiled by apostate Christianity. It was part of a pernicious non-biblical system where ‘penances’ could be allocated for specific sins on a rising scale of invented ‘seriousness’.
All sin is deadly (not just 7) because the punishment for all and every sin is death.
Ezekiel 18:20 The soul that sinneth, it shall die...
Romans 6:23 For the wages of sin is death...
Sin is the disobeying of any of God’s commandments.
We all sin and we all die.
Romans 3:23 For all have sinned, and come short of the glory of God;
Galatians 3:22 But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
By belief of the gospel, repentance and baptism into Christ all sins committed prior to baptism are forgiven.
Acts 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins...
Acts 22:16 And now why tarriest thou? arise, and be baptized, and wash away thy sins, calling on the name of the Lord.
After baptism sins are forgiven by repentance and confession in prayer.
1 John 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
ALL sins are forgivable save one
Matthew 12:31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Spirit shall not be forgiven unto men.
This exception is merited because the Jewish leaders, seeing the power of God working miracles of healing before their eyes, tried to deny the obvious by claiming that such miracles were performed by a fictitious ‘Beelzebub’.
Matthew 12:24 But when the Pharisees heard it, they said, This fellow doth not cast out devils, but by Beelzebub the prince of the devils.
Miracles by the power of the Holy Spirit are not performed today so we cannot ‘blaspheme the Holy Spirit’ in the way that the Jews did.
I hope you have found this helpful.
God bless you,