Question: Assalamu alaikum,
Is it necessary to ask the first wife permission (or inform) to marry a second wife?
Answer: Wa Alaikum As Salaam,
It is not necessary to ask the first wife for permission to marry a second wife. However, she should be informed of this marriage, less it creates problems between the spouses when she gains knowledge of the second marriage.
And Allah Knows Best.
Mufti Waseem Khan.