Repetition in Arabic rhetoric is not necessarily needless duplication. It can reinforce a warning, renew remembrance, or connect a recurring question with successive blessings and signs.
“Which of your Lord’s favors will you two deny?” (al-Raḥmān 55:13) recurs throughout the sūrah, each occurrence gaining a relation to its surrounding description.
A shift in the mode of address may likewise redirect speech from an individual to a group, or from third person to direct address. Interpretation must identify both the addressee and the local effect of the repetition.