What evidence did Abigail says that she drank the blood a charm to kill John proctors wife?

Abigail, pulling her away from the window: I told him every-thing,' he knows now, he knows everything we -

Betty: You drank blood, Abby! You didn’t tell him that!

Abigail: Betty, you never say that again! You will never--

Betty: You did, you did! You drank a charm to kill John Proctor’s wife! You drank a charm to kill Goody Proctor! (Page 20)

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TiTUBA: You beg me to conjure! She beg me make charm - (Page 44)