Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 20

Sanskrit:

तीर्थानां स्रोतसां गङ्गा समुद्र: सरसामहम् ।आयुधानां धनुरहं त्रिपुरघ्नो धनुष्मताम् ॥ २० ॥

ITRANS:

tīrthānāṁ srotasāṁ gaṅgāsamudraḥ sarasām ahamāyudhānāṁ dhanur ahaṁtripura-ghno dhanuṣmatām

Translation:

Among sacred and flowing things I am the holy Ganges, and among steady bodies of water I am the ocean. Among weapons I am the bow, and of the wielders of weapons I am Lord Śiva.

Purport:

Lord Śiva used his bow to completely cover with arrows the three demoniac cities built by Maya Dānava.