The Divorced wife who was made Halal
The Prophet (sal Allahu alaihi wa sallam) said, “Allah has cursed the one whose divorced wife was made Halal for him and the one who made her Halal.”
[Musnad Imam Ahmad and others and it is Authentic]
From amongst the ones whom Allah has cursed is the one who makes the divorced wife Halal (permissible) and the one whose divorced wife has become halal. Some people are so twisted that they try to play the Shariah by playing games with Allah’s laws. After a husband has divorced his wife 3 times and she completed her Iddah (waiting period), she cannot marry him anymore: unless she marries someone else and gets divorced from him. What this cursed man does is agree with another man to marry his ex wife so that this can be made possible and that after the man divorces her, he can take her back again. Both these conspiring men are cursed by Allah.
If the intention is to get married to be together and one day things did not work out and the new husband decided to divorce her or he died, the ex husband is allowed to take her back in this case – but not out of a blatant arrangement between them.
And Allah knows best!