A woman’s badly decomposed body was found in her Brooklyn home last night with a cryptic note found near her body that read: “I killed my wife, she was casting spells on me,” sources said.

The corpse was discovered at 10 p.m. in a predominantly Orthodox Jewish area of Midwood, after someone reported a foul smell, according to the law enforcement sources.

The 50-year-old woman had been stabbed multiple times in the stomach.

The body was found in the basement of the two-family house, and appeared to be several weeks old, authorities said

Police took her live-in boyfriend into custody after locating him at a psychiatric facility, where he said that she cast spells on him, sources said. He has not been charged yet.

He may have been committed by a relative.

Neighbors said the couple were observant Jews.

They also said they heard the women arguing with her husband on multiple occasions inside the home.