In between first and second Corinthians we read two Psalms and two chapters of Ezra.
Psalm 51, of David, written after Nathan confronted David after his adultery with Bathsheba. This Psalm explains fully, how God would say, after David was pointed out to be both an adulterer and a murderer: “He was a man after God’s own heart”.
Psalm 52, Of David. The Psalm is a contemplation of David, contrasting the final end of evil men with the rewards of the righteous.
Ezra 3. Worship was restored in Jerusalem and the restoration of the Temple began.
Ezra 4. There arouse resistance to building the Temple and the rebuilding of Jerusalem was successfully opposed (for a while).