Is the phrase "Sanatana Dharma" (सनातन धर्म) found in the Vedas?

Question

The phrase "Sanatana Dharma" seems to imply the eternal duties.

So, is the phrase found in the Vedas because I have seen many people saying that they are Sanatani and their religion is Sanatana Dharma?

Answer 1

Rig Veda 3.3.1

वैश्वानराय पृथुपाजसे विपो रत्ना विधंत धरुणेषु गातवे ।
अग्निर्हि देवाँ अमृतो दुवस्यत्यथा धर्माणि सनता न दूदुषत् ॥

vaishvAnarAya pRRithupAjase vipo ratnA vidhaMta dharuNeShu gAtave |
agnirhi devAN amRRito duvasyatyathA dharmANi sanatA na dUduShat ||

To him who shines afar, Vaisvanara, shall bards give precious thingthat he may go on certain paths: For Agni the Immortal serves the Deities, and therefore never breaks their everlasting laws.

Manu Smriti 4.138

सत्यं ब्रूयात् प्रियं ब्रूयान्न ब्रूयात् सत्यमप्रियम् ।
प्रियं च नानृतं ब्रूयादेष धर्मः सनातनः ।।

satyaM brUyAt priyaM brUyAnna brUyAt satyamapriyam ।
priyaM cha nAnRRitaM brUyAdeSha dharmaH sanAtanaH ।।

He shall say what is true; and he shall say what is agreeable; he shall not say what is true, but disagreable; nor shall he say what is agreeable, but untrue; this is the eternal law.

Srimad Bhagavatam 8.14.4

चतुर्युगान्ते कालेन ग्रस्ताञ्छ्रुतिगणान्यथा ।
तपसा ऋषयोऽपश्यन्यतो धर्म: सनातन: ।।

chaturyugAnte kAlena grastAnChrutigaNAnyathA ।
tapasA RRiShayo apashyanyato dharmaH sanAtanaH ।।

At the end of every four yugas, the great saintly persons, upon seeing that the eternal occupational duties of mankind have been misused, reestablish the principles of religion.

https://en.wikipedia.org/wiki/San%C4%81tan%C4%AB