Mark 1:5

5 and there were going forth to him all the region of Judea, and they of Jerusalem, and they were all baptized by him in the river Jordan, confessing their sins.

Mark 1:5 Meaning and Commentary

Mark 1:5

And there went out unto him all the land of Judea
The people of the land, a great number of them:

and they of Jerusalem;
the inhabitants of Jerusalem, hearing of this new preacher, the new doctrine that he taught, and the new ordinance that he administered:

and were all baptized of him in the river Jordan, confessing their
sins;
that is, as many of them as were brought to a sight and sense of their sins, and made a confession of them, these he baptized, or immersed, in the river Jordan; for certain it is, that there were many of the Pharisees and Sadducees who came, whom he rejected; (See Gill on Matthew 3:5), (See Gill on Matthew 3:6), (See Gill on Matthew 3:7).

Mark 1:5 In-Context

3 `A voice of one calling in the wilderness, Prepare ye the way of the Lord, straight make ye his paths,' --
4 John came baptizing in the wilderness, and proclaiming a baptism of reformation -- to remission of sins,
5 and there were going forth to him all the region of Judea, and they of Jerusalem, and they were all baptized by him in the river Jordan, confessing their sins.
6 And John was clothed with camel's hair, and a girdle of skin around his loins, and eating locusts and honey of the field,
7 and he proclaimed, saying, `He doth come -- who is mightier than I -- after me, of whom I am not worthy -- having stooped down -- to loose the latchet of his sandals;
Young's Literal Translation is in the public domain.