Professor Kashi Nath Upadhyaya in his "Early Buddhism and Bhagavadgita" page 16-19 says
Evidences for the existence of the MB after the 1st century A.D. are
too numerous and too well known to be recounted here. We may,
therefore, begin with the testimony of the works of Asvaghosa, a
Mahayana Buddhist of the 1st century A.D. In his ‘Buddhacarita’ ...
I would say the earliest text that refers to Bhagavad Gita is the Brahma Sutras. Though the sutras do not explicitly refer to Bhagavad Gita, both Adi Shankara and Ramanuja acharya mention that the word smriti in the sutras refer to Bhagavad Gita. See 4.2.21, 2.3.45, 1.3.23, 1.3.38, 3.2.17 etc. There are many more. Please see the translation.
This division has the greatest authority - Panini - behind it. In his Ashtadhyayi - he sees two languages - the language of Chandas and just plain "bhasha" the spoken language of his time.
Chandas approximately refers to older, metrical scriptures like Rig Veda.
Classical Sanskrit refers to the language codified by Panini, after excluding ...
Vedic sanskrit is different from classical sanskrit. Because vedic sanskrit was used around 1500 to 600bce and vedas were written in vedic sanskrit.
After that classical sanskrit was used.
There are major and minor differences in the pronunciation and spelling of words(same words) and vocabulary is also different .
Understand it with this example :
Rig Veda ...
I am giving here the opinion of Sri Chandrasekharendra Saraswathi MahaSwamiji on the topic. Quoting from the book "Hindu Dharma", which is composed of various speeches given by him.
Our nation, it is often alleged, does not have a sense of history.
In my opinion the Puranas are history. But to our educated people today history means the history ...
Yes. When Narada met Vyasa and asked him to write Bhagavata, he narrates a story from previous manvantara.
O Muni, in the last millennium I was born as the son of a certain maidservant engaged in the service of brāhmaṇas who were following the
principles of Vedānta. When they were living together during the four
months of the rainy season, I was engaged in ...