Bhagavad Gita 10.35

बृहत्साम तथा साम्नां गायत्री छन्दसामहम्।मासानां मार्गशीर्षोऽहमृतूनां कुसुमाकरः ॥१०.३५॥

bṛhatsāma tathā sāmnāṃ gāyatrī chandasāmahammāsānāṃ mārgaśīrṣo’hamṛtūnāṃ kusumākaraḥ

Among the hymns, I am the Brihatsaman; among meters, I am Gayatri; among months, I am Margasirsha; among seasons, I am the flowery season.

गीता