Translation:

230. So if a husband divorces his wife (irrevocably) he cannot after that remarry her until after she has married another husband and he has divorced her. In that case there is no blame on either of them if they reunite provided they feel that they can keep the limits ordained by Allah. Such are the limits ordained by Allah which He makes plain to those who understand.

Notes (Tafseer)

260. This is in continuation of the first sentence of ii. 229. Two divorces followed by re-union are permissible; the third time the divorce becomes irrevocable, until the woman marries some other man and he divorces her. This is to set an almost impossible condition. The lesson is: if a man loves a woman he should not allow a sudden gust of temper or anger to induce him to take hasty action. What happens after two divorces, if the man takes her back? See n. 261 to ii. 231.