Vasiṣṭha's teaching (Mahārāmāyaṇa) 3.60.62

3.60.62

śūnyodayāstamayavastu tamaḥprakāśaṃ
dikkālarūpyapi sadaikamanādiśuddham .
ādyantamadhyarahitaṃ sthitamacchamambu
saumyatvavīcivalanāḍhyamivaikameva .. 62

61. [Sanskrit available] He who knows the increate Brahma to be the measurer, measure and the thing measured (i. e. the creator, created and the creation), to be all one and himself, can never forget this certain truth of unity, nor ever fall into the error of dualism of the cause and effect.

62. [Sanskrit available] There is but one Being (SAT), who is Holy and without beginning; and who, though he appears to be of the forms of light and darkness, and of space and time, doth never rise nor set anywhere. He is without beginning, middle or end; and remains as a vast expanse of water, exhibiting itself in its waves and currents.