THE WHOLE of this surah (revealed about the middle of the Medina period) is devoted to one particular aspect of the problem of divorce, namely, to ordinances relating to the waiting-period which divorced women must undergo before the marriage is finally dissolved and they are allowed to remarry - thus amplifying and elucidating verses 228-233 of Al-Baqarah.
O PROPHET! When you1 [intend to divorce women, divorce them with a view to the waiting period appointed for them,2 and reckon the period [carefully], and be conscious of God, your Sustainer. Do not expel them from their homes;3 and neither shall they [be made to] leave4 unless they become openly guilty of immoral conduct.5 These, then, are the bounds set by God - and he who transgresses the bounds set by God does indeed sin against himself: [for, O man, although] thou knowest it not, after that [first breach] God may well cause something new to come about.6