1 Corinthians 1:17

1:17 For Christ did not send me to baptize, but to preach the gospel – and not with clever speech, so that the cross of Christ would not become useless.

1 Corinthians 12:13

12:13 For in one Spirit we were all baptized into one body. Whether Jews or Greeks or slaves or free, we were all made to drink of the one Spirit.