Mark 10:1

And he arose from thence, and cometh into the coasts of Judea by the farther side of Jordan: and the people resort unto him again; and, as he was wont, he taught them again.

Cross-references

Matthew 19:1-12 is the parallel account of the same journey and teaching, including the divorce debate not detailed in Mark 10:1.

John 18:20 records Jesus' claim to teach openly in public — consistent with the public teaching in Mark 10:1.