Maitrāyaṇīya Āraṇyaka 6.2

6.2

atha ya eṣo'ntare hṛtpuṣkara evāśrito'nnamatti sa eṣo'gnirdiviśritaḥ sauraḥ
kālākhyo'dṛśyaḥ sarvabhūtānyannamattīti | kaḥ puṣkaraḥ kiṃmayoveti
idaṃ vāva tatpuṣkaraṃ yo'yamākāśo'syemāścatasro diśaścatasra
upadiśodalasaṃsthā āsam | arvāgvicarata etau prāṇādityā etā
upāsītomityetadakṣareṇa vyāhṛtibhiḥ sāvitryā ceti

Now, he who is seated within the lotus of the heart and eats food, he is this fire residing in heaven, solar, called Time, invisible, who eats all beings as food. 'What is the lotus, and of what consists it?' This indeed is that lotus: this space. Its four directions and four intermediate directions are arranged as petals. These two, vital breath and the sun, wander nearby. One should worship these with the syllable Oṃ, with the sacred utterances (vyāhṛtis), and with the Sāvitrī.