The Islamic Shariah is the biggest mercy to mankind. It is plainly so, because it is not man-made laws, but laws from He who Created Man!
Allah (SWT) said in Surat Nisa':
[Surat An-Nisa; 4:34].
He also said:
[Surat at-Talaq 65:7].
In a Saheeh (authentic) Hadith,
The Prophet (SAW) said:
“That you feed her as you feed yourself, clothe her as you clothe yourself, do not strike the face, do not disgrace her,
Narrated by Abu Dawood (2142) and Ibn Majah (1850); classed as saheeh by Shaykh Nasiruddeen al-Albani (RH) in Saheeh Abi Dawood.
Ash-Shirazi ash-Shaafi‘i said in al-Muhadhdhab fi Fiqh al-Imam ash-Shaafi‘i (3/155):
"If it is proven that the husband is no longer able to spend on her, she has the choice of three options:
a) she may annul the marriage;
b) she may stay with him and allow him to be intimate with her,