Shiva Purana
भीमशंकरसंज्ञस्तु षष्ठः शम्भोर्महाप्रभोः ॥ अवतारो महालीलो भीमासुरविनाशनः ॥ २७॥
The sixth incarnation of Śiva, the great lord named Bhīmaśaṅkara, performed great sports. He destroyed the demon Bhīma.
english translation
bhImazaMkarasaMjJastu SaSThaH zambhormahAprabhoH ॥ avatAro mahAlIlo bhImAsuravinAzanaH ॥ 27॥
hk transliteration by Sanscript