Bhagavad Gita Chapter 10 Verse 35
भगवद् गीता अध्याय 10 श्लोक 35

बृहत्साम तथा साम्नां गायत्री छन्दसामहम्।
मासानां मार्गशीर्षोऽहमृतूनां कुसुमाकरः।।10.35।।



हिंदी अनुवाद - स्वामी तेजोमयानंद
।।10.35।। सामों (गेय मन्त्रों) में मैं बृहत्साम और छन्दों में गायत्री छन्द हूँ मैं मासों में मार्गशीर्ष (दिसम्बरजनवरी के भाग) और ऋतुओं में वसन्त हूँ।।


Kumara Vaishnava Sampradaya - Commentary
Lord Krishna reveals that among the hymns in  His  vibhuti  or  His  divine,
transcendental opulence the Sama Veda, His foremost vibhuti is  the  Brihat-
sama  which  is  a  special  prayer  that  is  indicated  in  the  Rig  Veda
VI.XXXXVI.I beginning tvam rddhim havamahe and glorifies the post  of  Indra
the ruler of all the demigods during the time when the Supreme Lord  Himself
assumes that position as He did in the case of  His  manavatara  incarnation
of Dharmasetu. The word marga-sirsah refers to harvesting  month  of  grains
which  is  His  vibhuti  and  the  word  rtunam   means   season   and   the
word kusumakarah means flowery which means His vibhuti is the springtime.