And how can you take it back while you have enjoyed with each other, and they have taken a solemn agreement from you?
The Three-Time-Knower Lord is ordaining the marriage between males and females. The marriage should be an agreement done witnessing the Witness Lord under the Light of Witness Adhikr. It is He Who created mankind from water, then He established relationships of both marriage and lineage as told in verse 25: 54. Male has to give the rent as dowry for enjoying with the woman and he has to meet all expenses of his wife and children. So breaking the marriage is the most hateful matter near Lord even though He has permitted it in unavoidable circumstances.
Here mentioned solemn agreement is just like the agreement which Lord has taken from Messenger Muhammad, Noah, Ibrahim, Moses, and Jesus as told in verse 33: 7. The believer lives here seeing Lord Allah under the Light of the Best Book Adhikr so that no evil deed will happen from him. He only utilizes Adhikr as the Safeguard against all calamities, disasters, diseases, and Hell. See the explanation 2: 226, 232; 3: 81-82, and 187.