Ma'arif al-Qur'an
Mufti Muhammad Shafiوَهُوَ الَّذِي خَلَقَ مِنَ الْمَاءِ بَشَرًا فَجَعَلَهُ نَسَبًا وَصِهْرًا (And He is the One who created man from water then made of him kinship of blood and kinship of in-laws. 25:54) نَسَب (nasab, translated above as 'kinship of blood' ) is that relationship which emanates from either parent, and صِهْر (sihr, translated above as 'kinship of in-laws' ) is that kinship which is drawn from the wife's side and is called in - laws. All these relations and bonds are Allah's graces given to mankind for a pleasant and tranquil life. If these relations are taken away from someone's life it will be impossible for him to live by himself.