The mouth of God is not written scripture but tradition!Only source of Divine truth!
Jesus answered, “It is written: ‘Man shall not live on bread alone, but on every word that comes from the mouth of God.’” Mt 4:4Now, brothers and sisters, I have applied these things to myself and Apollos for your benefit, so that you may learn from us the meaning of the saying, “Do not go beyond what is written.” Then you will not be puffed up in being a follower of one of us over against the other." 1 Cor 4:6.........
Apostolic tradition is what the apostles heard Christ teach and what they taught, some part of which was committed to writing by some apostles or under some apostles as the HS inspired!
Does the church need scripture to know the truth?
Now, brothers and sisters, I have applied these things to myself and Apollos for your benefit,
so that you may learn from us the meaning of the saying, “Do not go beyond what is written.”
Applies to the laity not the apostolic church! Which is the light (truth) and the pillar of truth! Matt 5:14 1 Tim 3:15
Thanks