Name #174 of 1000 · Viṣṇu Sahasranāma
महावीर्यःmahāvīryaḥ
Mahavirya
He of supreme potency
From shloka 19 · chapter Kūrma
महाबुद्धिर्महावीर्यो महाशक्तिर्महाद्युतिः ।
अनिर्देश्यवपुः श्रीमानमेयात्मा महाद्रिधृक् ॥
mahābuddhirmahāvīryo mahāśaktirmahādyutiḥ
anirdeśyavapuḥ śrīmānameyātmā mahādridhṛk
Also in this shloka: mahābuddhiḥ · mahāśaktiḥ · mahādyutiḥ · anirdeśyavapuḥ · śrīmān · ameyātmā · mahādridhṛk