ChU 8.1.2
तं चेद् ब्रूयुर् यद् इदम् अस्मिन् ब्रह्मपुरे दहरं पुण्डरीकं वेश्म दहरो ऽस्मिन्न् अन्तराकाशः किं तद् अत्र विद्यते यद् अन्वेष्टव्यं यद् वाव विजिज्ञासितव्यम् इति । स ब्रूयात्
taṃ ced brūyur yad idam asmin brahmapure daharaṃ puṇḍarīkaṃ veśma daharo 'sminn antarākāśaḥ kiṃ tad atra vidyate yad anveṣṭavyaṃ yad vāva vijijñāsitavyam iti | sa brūyāt
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
And if they should say to him: 'Now with regard to that city of Brahman, and the palace in it, i. e. the small lotus of the heart, and the small ether within the heart, what is there within it that deserves to be sought for, or that is to be understood?'
Translated by F. Max Müller