p. 269
सत्ये वै ब्रह्मणि तिष्ठंस्तद्विद्वान्सर्वविद्भवेत् ॥ ५० ॥
In plain words
Stay established in Brahman, the one thing that is actually real; the person who knows That is the knower of everything. (50)
Close to the Sanskrit
Abiding indeed in the real Brahman, knowing That, one would become the knower of all. (50)