'Preaching' in the Bible

Now in those days John the Baptist came preaching in the Judean wilderness

And he was preaching, saying, "One [who is] more powerful than I is coming after me, of whom I am not worthy to bend down [and] untie the strap of his sandals.

And he went into all Galilee preaching in their synagogues and expelling demons.

And he went into all the surrounding region of the Jordan, preaching a baptism of repentance for the forgiveness of sins,

And he was preaching in the synagogues of Judea.

And it happened that {afterward} also he was going about from [one] town and village [to another] preaching and proclaiming the good news concerning the kingdom of God, and the twelve [were] with him,

For since, in the wisdom of God, the world through its wisdom did not know God, God was pleased through the foolishness of preaching to save those who believe.

and my speech and my preaching [were] not with the persuasiveness of wisdom, but with a demonstration of the Spirit and power,

But I discipline my body and subjugate [it], lest somehow [after] preaching to others, myself should become disqualified.

But if Christ has not been raised, then our preaching [is] in vain, and your faith [is] in vain.

Now, brothers, if I am still preaching circumcision, why am I still being persecuted? In that case the stumbling block of the cross has been abolished.