The time to teach a biblical story is when it is the primary passage for your message, not when it is a secondary illustration of another passage. In other words, you should preach the story Joseph and his brothers as part of a series through Genesis, and not as an illustration of Romans 8:28.
Alliteration [in preaching] runs a third danger. Not only may it lead the speaker to be unclear or unbiblical, it also suggests to the listeners that the most important thing in the message to remember is the outline. It subtly says to the listener, “Get this outline! Remember it!”
This series of blogs will look at some dubious practices that have entered our preaching. All of these questionable traditions are addressed in Talbot’s Doctor of Ministry track in “Advanced Biblical Preaching.”
... Alliteration, in ordinary writing, is the literary device of repeating the same initial sound or letter several times in rather close succession (e.g. “conspicuous consumption,” “nattering nabobs of negativism”). In preaching, alliteration is most frequently used to convey the major outline points of a sermon. There are times, of course, when alliteration is appropriate and effective in preaching ... But when a sermon outline extends to multiple main points, the use of alliteration runs the risk of “four bad things.”