Matthew 12:31

Irenaeus Against Heresies Book III

he speaks expressly of prophetical gifts, and recognises men and women prophesying in the Church. Sinning, therefore, in all these particulars, against the Spirit of God,[158]

Shepherd of Hermas Vision Second

then shall they be forgiven all the sins which in former times they committed, and forgiveness will be granted to all the saints who have sinned even to the present day, if they repent with all their heart, and drive all doubts from their minds.[9]

Theognostus of Alexandria From His Seven Books of Hypotyposes

unes with the perfected, and yet we could never say on that account that the teaching of the Spirit is superior to the teaching of the Son, but only that the Son condescends to the imperfect, while the Spirit is the seal of the perfected; even so it is not on account of the superiority of the Spirit over the Son that the blasphemy against the Spirit is a sin excluding impunity and pardon, but because for the imperfect there is pardon, while for those who have tasted the heavenly gift,[13]

Didache

ye shall neither try nor judge; for every sin shall be forgiven, but this sin shall not be forgiven.[108]