गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

That rule is like the yajñas.
Purport by Śrīla Baladeva Vidyābhūṣaṇa
The "savas" here are the seven yajñas beginning with the saurya-yajña and
ending with the śataudana-yajña which, because they are performed with only one
fire, may be performed only by the followers of the Atharva Veda. The worship of
the Supreme Lord, however, can performed by the followers of all the Vedas.
The word "salila-vat" (like water) is an alternate reading of the first word in this
sūtra. If this reading is accepted, then the sūtra means, "As all waters flow, without
restriction, into the sea, so all the statements of the Vedas describe, as much as
they have the power, the Supreme Personality of Godhead." In the Agni Purāṇa it
is said:
yathā nadīnāṁ salilaṁ
śaktyā sāgaratāṁ vrajet
evaṁ sarvāṇi vākyāni
puṁ-śaktyā brahma-vittaye
"As the water of rivers, as far as it has the power, always enters the sea, so all
words, as far as their speaker has the power, should be employed to understand
the Supreme Lord."
Sūtra 5
darśayati ca
darśayati—reveals; ca—also.
It also reveals it.
Purport by Śrīla Baladeva Vidyābhūṣaṇa
In the Kaṭha Upaniṣad (1.2.15) it is said: