MUṆḌAKA UPANISHAD · 2.2.11

ब्रह्मैवेदममृतं पुरस्ताद्ब्रह्म पश्चाद्ब्रह्म दक्षिणतश्चोत्तरेण ।
अधश्चोर्ध्वं च प्रसृतं ब्रह्मैवेदं विश्वमिदं वरिष्ठम् ॥ ११॥

brahmaivedamamṛtaṃ purastādbrahma paścādbrahma dakṣiṇataścottareṇa ।
adhaścordhvaṃ ca prasṛtaṃ brahmaivedaṃ viśvamidaṃ variṣṭham ॥ 11॥

All this is Brahman immortal, naught else; Brahman is in front of us, Brahman behind us, and to the south of us and to the north of us and below us and above us; it stretches everywhere. All this is Brahman alone, all this magnificent universe.

Sri Aurobindo · CWSA 18, p. 141