Mimamsashastrasarvasva 3.15

3.15

tacchiṣṭatvanimittā vā kāṭhakāṅgirasādivat
taduktaiḥ (ktaṃ) śākyaiḥ—yadyotpādādvā tathāgatānāmanutpādādvā
sthitaivaiṣā dharmanityateti | utpād[^1]diti pravāhanityatvamabhipretya
8 sāmānyaśrutikalpanādhikaraṇam
anumānavyavasthānāttatsaṃyuktaṃ pramāṇaṃ syāt

or it is caused by their being cultured, as in the case of the Kāṭhakas, Āṅgirasas, and so on.
Thus it has been stated by the Śākyas: “Whether from the arising of the Tathāgatas or from their non-arising, this eternity of dharma is indeed established.” By "arising," the eternity of a continuous stream is intended.
8. The topic of the assumption of a general Vedic text:
“Because inference is restricted, that which is connected with it should be authoritative.”