What scripture did you use to determine this?
Chapter 1: Of the Holy Scriptures
1._____ The Holy Scripture is the only sufficient, certain, and infallible rule of all saving knowledge, faith, and obedience, although the light of nature, and the works of creation and providence do so far manifest the goodness, wisdom, and power of God, as to leave men inexcusable; yet are they not sufficient to give that knowledge of God and his will which is necessary unto salvation. Therefore it pleased the Lord at sundry times and in divers manners to reveal himself, and to declare that his will unto his church; and afterward for the better preserving and propagating of the truth, and for the more sure establishment and comfort of the church against the corruption of the flesh, and the malice of Satan, and of the world, to commit the same wholly unto writing; which maketh the Holy Scriptures to be most necessary, those former ways of God's revealing his will unto his people being now ceased.
( 2 Timothy 3:15-17; Isaiah 8:20; Luke 16:29, 31; Ephesians 2:20; Romans 1:19-21; Romans 2:14,15; Psalms 19:1-3; Hebrews 1:1; Proverbs 22:19-21; Romans 15:4; 2 Peter 1:19,20 )
Here are some more from an article by robert brace:
he phrase 'signs of an apostle' is taken from 2 Corinthians 12:12 and is a reference to the fact that miracles were a major sign identifying the ministry of the first century apostles. In short, God enabled the apostles to perform various miraculous signs. Let us consider 2 Corinthians 12:12, then look at examples of this in the Book of Acts:
“Here is God's 'bottom line' on signs for our present age: He has already provided one through the sacrifice and resurrection of Jesus Christ!
'...A wicked and adulterous generation asks for a miraculous sign! But none will be given it except the sign of the prophet Jonah. For as Jonah was three days and three nights in the belly of a huge fish, so the Son of Man will be three days and three nights in the heart of the earth.' (Matthew 12:39-40). ”
'The things that mark an apostle - signs, wonders and miracles - were done among you with great perseverance.' (2 Corinthians 12:12, NIV throughout).
'Everyone was filled with awe, and many wonders and miraculous signs were done by the apostles.' (Acts 2:43).
'The apostles performed many miraculous signs and wonders among the people.' (Acts 5:12).
'...People brought their sick into the streets and laid them on beds and mats so that at least Peter's shadow might fall on some of them as he passed by. Crowds gathered also from the towns around Jerusalem, bringing their sick and those tormented by evil spirits, and all of them were healed.' (Acts 5:15-16).
'So Paul and Barnabas spent considerable time there, speaking boldly for the Lord, who confirmed the message of his grace by enabling them to do miraculous signs and wonders.' (Acts 14:3).
'The whole assembly became silent as they listened to Barnabas and Paul telling about the miraculous signs and wonders God had done among the Gentiles through them.' (Acts 15:12).
'God did extraordinary miracles through Paul, so that even handkerchiefs and aprons that had touched him were taken to the sick, and their illnesses were cured and the evil spirits left them.' (Acts 19:11-12).
Neither can we leave out Hebrews 2, which confirms that the first century was a very special time in which the apostles - witnesses of the ministry of Jesus - were granted the ability to perform special signs:
'How shall we escape if we ignore such a great salvation? This salvation, which was first announced by the Lord, was confirmed to us by those who heard him. God testified to it by signs, wonders and various miracles, and gifts of the Holy Spirit distributed according to his will.' (Hebrews 2:3-4).
