Sahih al-Bukhari — Divine Will (Al-Qadar) — Hadith No: 6601
Translation
Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "No woman should ask for the divorce of her sister (Muslim) so as to take her place, but she should marry the man (without compelling him to divorce his other wife), for she will have nothing but what Allah has written for her