श्रीभगवानुवाच

śrī-bhagavān uvāca

śrī-bhagavān uvāca — the Supreme Personality of Godhead said; imam — this; vivasvate — unto the sun-god; yogam — the science of one’s relationship to the Supreme; proktavān — instructed; aham — I; avyayam — imperishable; vivasvān — Vivasvān (the sun-god’s name); manave — unto the father of mankind (of the name Vaivasvata); prāha — told; manuḥ — the father of mankind; ikṣvākave — unto King Ikṣvāku; abravīt — said.

The  Personality of Godhead, Lord Śrī Kṛṣṇa, said: I instructed this  imperishable science of yoga to the sun-god, Vivasvān, and Vivasvān  instructed it to Manu, the father of mankind, and Manu in turn  instructed it to Ikṣvāku.

Herein we find the history of the Bhagavad-gītā traced from a remote time when it was delivered to the royal order of  all planets, beginning from the sun planet. The kings of all planets are  especially meant for the protection of the inhabitants, and therefore  the royal order should understand the science of Bhagavad-gītā in order to be able to rule the citizens and protect them from material  bondage to lust. Human life is meant for cultivation of spiritual  knowledge, in eternal relationship with the Supreme Personality of  Godhead, and the executive heads of all states and all planets are  obliged to impart this lesson to the citizens by education, culture and  devotion. In other words, the executive heads of all states are intended  to spread the science of Kṛṣṇa consciousness so that the people may  take advantage of this great science and pursue a successful path,  utilizing the opportunity of the human form of life.

https://vedabase.io/en/library/bg/4/1/