Harassment and domestic violence by father, what action can be take?

My father badly treats my mother. He abuses her both psychologically and physically. my mother has been a subject to this for a very longer period of time. recently he beat her brutally and despite her whining and requests to spare her he continued. that i was informed a day later as i live far from home. upon seeing her i decided to leave for my maternal home. i did not file an fir there as i was perplexed at the situation. my maternals reside in a different stateM.P and the place of crime was a different stateBIHAR. my mother filed an FIR in MP. and we do not have proof of any physical injury except for a few call recordings which consist of threats from him. and he also threatens me to come to my university premises and disturb if i do not bring back my younger brother to him. but he does not want to go to him. in fact none of us. suggest a remedy. i am a hindu.