Acts 19:3

And he said, What sort of baptism did you have? And they said, The baptism of John.

Acts 18:25

This man had been trained in the way of the Lord; and burning in spirit, he gave himself up to teaching the facts about Jesus, though he had knowledge only of John's baptism:

Matthew 28:19

Go then, and make disciples of all the nations, giving them baptism in the name of the Father and of the Son and of the Holy Spirit:

Matthew 3:1-17

And in those days John the Baptist came preaching in the waste land of Judaea,

Luke 3:1-38

Now in the fifteenth year of the rule of Tiberius Caesar, Pontius Pilate being ruler of Judaea, and Herod being king of Galilee, his brother Philip king of the country of Ituraea and Trachonitis, and Lysanias king of Abilene,

Acts 8:16

For up to that time he had not come on any of them; only baptism had been given to them in the name of the Lord Jesus.

1 Corinthians 12:13

For through the baptism of the one Spirit we were all formed into one body, Jews or Greeks, servants or free men, and were all made full of the same Spirit.

Treasury of Scripture Knowledge

Summary

And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.

Unto john's

General references

Bible References

Unto what

Matthew 28:19
Go then, and make disciples of all the nations, giving them baptism in the name of the Father and of the Son and of the Holy Spirit:
1 Corinthians 12:13
For through the baptism of the one Spirit we were all formed into one body, Jews or Greeks, servants or free men, and were all made full of the same Spirit.

Unto john's

Acts 18:25
This man had been trained in the way of the Lord; and burning in spirit, he gave himself up to teaching the facts about Jesus, though he had knowledge only of John's baptism:

General references

Acts 13:24
For whose coming John made ready the way by preaching to all the people of Israel the baptism which goes with a change of heart.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain