1 Chronicles 2:38 records part of a family genealogy, stating that Obed was the father of Jehu, and Jehu was the father of Azariah. This verse is simply listing the line of descent within the tribe of Judah.
This verse is found in a section where the writer of 1 Chronicles is carefully tracing the descendants of Judah for the people of Israel. The purpose is to document the family lines, which was important for tribal identity, inheritance, and leadership roles in ancient Israel. The verse does not include any narrative or teaching, but helps establish the continuity of the family tree.