Answer
(Fatwa: 1360/1089/B=1433)
It is the right of father to nourish their children till they are grown up. And it is also the right of father to marry all of them after they are adult. Then he can separate them and ask them to earn for their livelihood. You should not be so strict towards your children rather you should be polite for them, and then they shall listen to your talk. If you give up strictness they shall start obeying you and they shall not turn uncivilized.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband