Shiva Purana

siva.sh/siva-purana/kotirudra-samhita/8/25

माघासितचतुर्दश्यां महाबलसमर्चनम् ।। विमुक्तिदं विशेषेण सर्वेषां पापिनामपि ।। २५ ।।

sanskrit

The worship of Mahābala on the fourteenth day in the dark half of the month of Māgha yields salvation particularly even to the sinners.

english translation

mAghAsitacaturdazyAM mahAbalasamarcanam || vimuktidaM vizeSeNa sarveSAM pApinAmapi || 25 ||

hk transliteration by Sanscript