Translation:

9. To dwell therein. The promise of Allah is true: and He is Exalted in power Wise.

Notes (Tafseer)

3586. He is Exalted in power, and can carry out His Will, and nothing can stop the carrying out of His promise. He is also infinitely Wise: His promise is therefore full of meaning: it is not merely without purpose: it has a place in the Universal Plan.