Mark 1:5

5 The whole Judean countryside and all the people of Jerusalem went out to him. Confessing their sins, they were baptized by him in the Jordan River.

Read Mark 1:5 Using Other Translations

And there went out unto him all the land of Judaea, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins.
And all the country of Judea and all Jerusalem were going out to him and were being baptized by him in the river Jordan, confessing their sins.
All of Judea, including all the people of Jerusalem, went out to see and hear John. And when they confessed their sins, he baptized them in the Jordan River.

What does Mark 1:5 mean?

John Gill's Exposition of the Bible
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).

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