What to do when your husband tells you that he wishes you dead and that you should kill yourself?

I had a traumatic childhood and teenage years, I was abandoned by my mother raised by a grandmother , my father never acknowledge me - I was born out of wedlock- and was left to my own at age 16, despite of all I put myself through schools and graduate from college. In the interim I tried to commit suicide three times at ages 13, 18 , and 26 . The last time I was already living with the man that became my husband and with who I have 2 kids, I have been married for 23 yrs and we have not have exactly a perfect marriage , always bickering and fighting and staying together mostly because I have no family other than my kids or place to go , I also have a huge debt of almost $50000 in credit cards accrued in the last 4 years . Two days ago after a quarrel that was - as usual- witnessed by my kids - I can not afford therapy- so please do not tell me I need to go to a therapist - he screamed at me and told me that it would be better for everyone if I kill myself. I am seriously considering it...if I could only make sure the kids will be ok when I am gone.