Taittirīyopaniṣat 03.12
kṣema iti vāci। yogakṣema iti prāṇāpānayoḥ। karmeti hastayoḥ। gatiriti pādayoḥ। vimuktiriti pāyau। iti mānuṣīḥ samājñāḥ। atha daivīḥ। tṛptiriti vṛṣṭau। balamiti vidyuti। yaśa iti paśuṣu। jyotiriti nakṣatreṣu। prajātiramṛtamānanda ityupasthe। sarvamityākāśe ॥12॥
Welfare is in speech; acquisition and preservation are in prāṇa and apāna; action is in the hands; movement is in the feet; liberation is in the anus—these are the human designations. Now the divine: satisfaction is in rain; strength is in lightning; fame is in animals; light is in the stars; progeny, immortality, and bliss are in the generative organ; all is in space.
Taittirīya Bhāshya 03.12
Testimonial goes on to explain how the Lord, being present in various forms, acts and enables the functioning of the world. In prakrti, the Supreme Person is all because of being the giver of everything.
"kṣemakṛtvāt kṣemanāmā vācisthaḥ sa paro hariḥ। yoganāmā tathā prāṇe sarvakāmaniyojanāt॥
"He who is called Kṣema, arising from the act of securing and abiding in speech, is the supreme Hari. Likewise, as Yoga, he abides in the vital breath due to the uniting of all desires.
kṣemanāmā kṣemakṛttvāt apāne hi hariḥ svayam। karmanāmā hastagataḥ karmakṛttvāt janārdanaḥ॥
Hari, called Kṣema because he protects and he himself resides in apāna; Janārdana, called Karma because he acts, is present in the hand.
gatidatvāt gatirnāma pādasthaḥ puruṣottamaḥ। visargakṛd vimuktyākhyaḥ pāyusthaḥ paramo vibhuḥ॥
Because He is the giver of movement, He is called 'Gati' and is situated at the feet as the Supreme Person; as the creator of emission, known as liberation, He is present at the anus, being the supreme and all-pervading one.
adhyātmastha iti prokto'thādhidaivagataṃ śṛṇu। parjanye tṛptināmāsau tṛptidatvājjanārdanaḥ॥
He who is situated in the self is thus described; now hear about the divine aspect. In the rain cloud, he is called 'Satisfaction'; because he gives satisfaction, Janardana (Krishna) is so named.
vāyau tu balanāmā ca baladatvāt sadaiva hi। yaśaḥpradatvāt dakṣe tu yaśaḥ paśvabhimānini॥
In Vāyu, he is always called Bala because he gives strength. In Dakṣa, he is called Yaśas because he gives fame to the one proud of cattle.
nakṣatreṣu jyotir-ākhyo jyotir-dātṛtvato hariḥ। upasthamāninī śive prajāty-ānanda-santateḥ॥
Hari, known as the light among the stars and as the giver of light, is present in the auspicious one, the mother of the blissful lineage of progeny.
dātṛtvāt tattadākhyo'sau santatistvamṛtaṃ smṛtam। sarvaḥ sarvapradatvāt tu prakṛtau puruṣottamaḥ॥"
Because of being a giver, he who is called by various names, you are remembered as immortal continuity. But in nature, the Supreme Person is all, because of being the giver of everything."