Bhagavad Gita, Chapter 13, Verse 4

ऋषिभिर्बहुधा गीतं छन्दोभिर्विविधैः पृथक् । ब्रह्मसूत्रपदैश्चैव हेतुमद्भिर्विनिश्चितैः

ṛṣibhirbahudhā gītaṃ chandobhirvividhaiḥ pṛthak | brahmasūtrapadaiścaiva hetumadbhirviniścitaiḥ

Translation

Sung by sages, in many ways and distinctly, in various hymns, as also in the suggestive words about Brahman, full of reasoning and decisive.

— Alladi Mahadeva Sastri

Word meanings

ṛṣibhiḥ
by Rishis
bahudhā
in many ways
gītam
sung
chandobhiḥ
by metres
vividhaiḥ
(by) various
pṛthak
severally
brahmasūtrapadaiḥ
by Brahma-sūtra-words
ca
and
eva
even
hetumadbhiḥ
(by) full of reason
viniścitaiḥ
(by) ascertained

Śaṅkarācārya's commentary

Sages (ṛṣis): such as Vasiṣṭha. Hymns: such as the Ṛk. The true nature of Kṣetra and Kṣetrajña has also been taught in the Brahma-sūtras, i.e., in the passages treating of Brahman — such as "Only as the Self, let a man contemplate Him" (Bṛ. Up. 1.4.7) — in the words through which alone Brahman is known. They are full of reasoning. They admit of no doubt, i.e., they are productive of certain knowledge.