Mantrabrahmana 1.6.11

1.6.11

sūrya vrata-pate vratam cariṣyāmi
tat te pra-bravīmi
tat śakeyam tena ṛdhyāsam /
idam aham an-ṛtāt satyam upa-emi // svāhā //

O Sūrya, lord of sacred observances, I will perform a sacred observance;
that I proclaim to you;
may I be capable of it, may I prosper by it.
Here I go from falsehood to truth. Svāhā!