निमेषार्धं न तिष्ठन्ति वृत्तिं ब्रह्ममयीं विना ।यथा तिष्ठन्ति ब्रह्माद्याः सनकाद्याः शुकादयः ॥ १३४ ॥
In plain words
Not for half a blink do they stay without the vṛtti that is made of Brahman alone. That is how Brahmā and those after him abide, how Sanaka and his brothers abide, how Śuka and the rest abide.
Close to the Sanskrit
They do not remain even half a blink without the modification consisting of Brahman — as Brahmā and the rest, Sanaka and the rest, Śuka and the rest remain.