"Preached" means delivering a speech or teaching about a religious or moral topic to a group of people, often in a formal setting like a church, mosque, or synagogue. Full definition
But also, the words of preaching in this context are the vehicles of the gospel, which is the hopeful message of new meaning and power for life. (religion-online.org)
Open your mind and learn instead of preaching about learning only to find that you don't truly know anything about your subject. (religion.blogs.cnn.com)
So, I'm moderately interested in your justification for not preaching on giving. (nakedpastor.com)