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What is the exact verbal noun (مصدر) form for Bab Fay'alah using the root خ-ع-ل?

Attached Trilateral (Mujarrad) - Bab 5: Fay'alah & Bab 6: Fay'alah

• خَيْعَلَةٌ
• قَلْنَسَةٌ
• مُخَيْعِلٌ