Translation:

21. Has the Story of the Disputants reached thee? Behold they climbed over the wall of the private chamber;

Notes (Tafseer)

4171. This story or Parable is not found in the Bible, unless the vision here described be considered as equivalent to Nathan's parable in 11 Samuel, xi, and xii. Baidhawi would seem to favour that view, but other Commentators reject it. David was a pious man, and he had a well-guarded private chamber (mihrab) for Prayer and Praise.