Kane Brown‘s younger sister was stabbed multiple times on Tuesday, according to the singer and news outlets. Brown took to Facebook to ask for prayers, and offer a warning to the person responsible.

“Prayers for my sister please,” Brown writes. “I’m all the way out in Nebraska and get a text that she was stabbed 4 times! You better hope I don’t find out who you are. I’m so sick to my stomach right now.”

Read More: Kane Brown Asks for Prayers for His Sister After Stabbing