Antioch

St. Ignatius of Antioch (AD 50-?, d. from AD 98-AD 117) from his Letter to the Trallians (Chapters 2 and 3).  Since Ignatius wrote this letter near his death, he provides an extremely early witness to the threefold character of the Church hierarchy, including the concept that apart from this order there is no Church. He also adds that one should respect the bishop as one would respect Jesus.

CHAPTER II.–BE SUBJECT TO THE BISHOP, ETC.

For, since ye are subject to the bishop as to Jesus Christ, ye appear to
me to live not after the manner of men, but according to Jesus Christ, who
died for us, in order, by believing in His death, ye may escape from death. It
is therefore necessary that, as ye indeed do, so without the bishop ye should
do nothing, but should also
be subject to the presbytery, as to the apostle of Jesus Christ, who is our
hope, in whom, if we live, we shall [at last] be found. It is fitting also
that the deacons, as being [the ministers] of the mysteries of Jesus Christ,
should in every respect be pleasing to all. For they are not ministers of
meat and drink, but servants of the Church of God. They are bound, therefore,
to avoid all grounds of accusation [against them], as they would do fire.

CHAPTER III.–HONOUR THE DEACONS, ETC.

In like manner, let all reverence the deacons as an appointment of
Jesus Christ, and the bishop as Jesus Christ, who is the Son of the Father,
and the presbyters as the sanhedrin of God, and assembly of the apostles.
Apart from these, there is no Church. Concerning all this, I am persuaded
that ye are of the same opinion. For I have received the manifestations of
your love, and still have it with me, in your bishop, whose very appearance is
highly instructive, and his meekness of itself a power; whom I imagine even
the ungodly must reverence, seeing they are also pleased that I do not
spare myself. But shall I, when permitted to write on this point, reach such a
height of self-esteem, that though being a condemned man, I should issue
commands to you as if I were an apostle?

Read the whole letter at NewAdvent.

Image from St. Charles Borromeo Church