I can't leave my cats with my physically abusive father but I can't take them with me either

We have had our two cats Mogwai (7) and Marmalade (5) since kittens

Me and my mum love them but she's moved out and now I'm trying to move out as well because of my dad

He has promised to murder both the cats, he's told me multiple times how much he hates them, he says he's never harmed them but they're absolutely terrified of him and considering he's also said he's never harmed me or my mum I know he's either delusional or lying

I need advice on what to do, they're mostly outdoor cats, they have tons of green open space where they are now.​