Bhagavan Shri Vishnu Hari in Vedas

 

Quoting from source:

Who is the God of the Purusha Sukta, Vishnu or Shiva?

Sripad Madhvacarya, in his Vedanta Sutra (1.2.26) Bhasya, quotes Brahma Maha Purana saying thus—

    "Just as the Purusha Sukta invariably declares only Vishnu, so be my mind ever devoted to Vishnu (alone)."

Acarya further quotes Brhat Brahma Purana saying thus—

    “All the Vedas and their supplementary disciplines do not, O Narada, declare Vishnu and Vishnu alone so distinctly and fully as the Purusha Sukta does."

Even further, Acarya quotes Skanda Purana which says—

    “At that time, great King Rama only is spoken of by every name (Rama was the subject of everybody’s talk), just as Vishnu alone is spoken of in the Purushasukta.”

Srimad Bhagavatam 10.1.20 states—

    तत्र गत्वा जगन्नाथं देवदेवं वृषाकपिम् । पुरुषं पुरुषसूक्तेन उपतस्थे समाहित: ॥

    “After reaching the shore of the Ocean of Milk, the demigods worshiped the Supreme Personality of Godhead, Lord Viṣṇu, the master of the whole universe, the supreme God of all gods, who provides for everyone and diminishes everyone’s suffering. With great attention, they worshiped Lord Viṣṇu, who lies on the Ocean of Milk, by reciting the Vedic mantras known as the Puruṣa-sūkta.”

Skanda Purana 5.1.57.22-24 states—

    इति श्रुत्वा वचस्तेषां ब्रह्मा लोकपितामहः ।।
    समुत्थाय ततः सर्वैर्विष्णुलोकं जगाम ह ।।
    तत्र गत्वा समाराध्य विष्णुं देवगणैः सह ।।
    स्तुतिं पुरुषसूक्तेन विष्णोरतुलतेजसः ।।

    “On hearing their words, Brahmā, the grandfather of the world, rose up from there. Then he went to Viṣṇuloka along with all of them. For propitiating Viṣṇu of uncomparable splendour they recited Puruṣasūkta, for their own prosperity.”

Padma Purāna 6.124.17 states —

    पुरुषसूक्तेन यो नित्यं कार्तिके अर्चयेद्धरिम् वर्षकोटिसहस्राणि पूजितस्तेन केशव

    He who, everyday in Kārtika, worships Viṣṇu with the recital of the Puruṣa-sūkta has worshipped Viṣṇu for thousands of crores of years.

Source 2

Rig Veda 1.22.20: Vishnu occupies the paramount position. All the other deities look always to His feet.

Rig Veda 1.22.21: They always sing the holy sublime glories of Lord Vishnu's supreme abode.

Rig Veda 10.113.2: Vishnu is glorified because of who and what He intrinsically is. Indra, on the other hand, is only glorious circumstantially. (Vīrasaiva said in a recent post that Indra is a name for Shiva, so here)

Rig Veda 1.156.2: Vishnu is the most ancient of all, yet also the most recent. Nothing and no one creates Vishnu, yet Vishnu creates everyone and everything.

Aitareya Brāhmaṇa (of Rig Veda) 1.1.1: Agni is the lowest and Vishnu is the highest among devas. All other gods occupy positions that are in between.

Yajurveda Taittiriya Samhita 5.5.1: Vishnu is the supreme amongst devatas.

Satpath Brahmana (of Yajur Veda) 14.1.1.5: Viṣṇu first attained it, and he became the most excellent of the gods; whence people say, 'Viṣṇu is the most excellent of the gods.

RV 7.99.1: Men come not nigh thy majesty who growest beyond all bound and measure with thy body. Both thy two regions of the earth, O Viṣṇu, we know: thou God, knowest the highest also.

Narayana Sukta: The Lord Narayana is the Supreme Absolute; Narayana is the Supreme Reality; Narayana is the Supreme Light; Narayana is the Supreme Self; Narayana is the Supreme Meditator; Narayana is the Supreme Meditation.

It states this as well: Whatever all this universe is, seen or heard of—pervading all this, from inside and outside alike, stands supreme the Eternal Divine Being (Narayana).

Katha Upanishad 1.3.9: But the man who has a discriminating intellect for the driver and a controlling mind for the reins, reaches the end of the road, i.e., that highest place of Vishnu.

Shatapath Brahmana 3.6.3.3: All yagnas are for Vishnu alone.