Rig Veda 1.22.16

Sanskrit text [Accents, Plain, Transliterated]:

अतो॑ दे॒वा अ॑वन्तु नो॒ यतो॒ विष्णु॑र्विचक्र॒मे । पृ॒थि॒व्याः स॒प्त धाम॑भिः ॥
अतो देवा अवन्तु नो यतो विष्णुर्विचक्रमे । पृथिव्याः सप्त धामभिः ॥
ato devā avantu no yato viṣṇur vicakrame | pṛthivyāḥ sapta dhāmabhiḥ ||

English translation:

“May the gods preserve us (from that portion) of the earth whence Viṣṇu (aided) by the seven metres, stepped.”

Commentary by Sāyaṇa: Ṛgveda-bhāṣya

Viṣṇu = parameśvara, supreme ruler, one who pervades the world: viṣṇur-viṣaterva vyaśnoter-vā;

Vicakrame = stepped; vividhapādakramaṇam kṛtavān,  he made the goiing of various steps;  gods, headed by Viṣṇu subdued the invincible earth, using the seven metres of the Veda as their instrumental uments; an allusion to the Trivikrama avatāra where Viṣṇu traverses the three worlds in three steps; preserve us from the earth = the hindrance of the sin of those inhabiting the earth, bhūloke vartamānānām pāpanivāraṇam

Details:

Ṛṣi (sage/seer): medhātithiḥ kāṇvaḥ [medhātithi kāṇva];
Devatā (deity/subject-matter): viṣṇurdevo vā ;
Chandas (meter): gāyatrī;
Svara (tone/note): Swar;

Padapatha [Accents, Plain, Transliterated]:

अतः॑ । दे॒वाः । अ॒व॒न्तु॒ । नः॒ । यतः॑ । विष्णुः॑ । वि॒ऽच॒क्र॒मे । पृ॒थि॒व्याः । स॒प्त । धाम॑ऽभिः ॥
अतः । देवाः । अवन्तु । नः । यतः । विष्णुः । विचक्रमे । पृथिव्याः । सप्त । धामभिः ॥
ataḥ | devāḥ | avantu | naḥ | yataḥ | viṣṇuḥ | vi-cakrame | pṛthivyāḥ | sapta | dhāma-bhiḥ

Multi-layer Annotation of the Ṛgveda

[Rigveda 1.22.16 English analysis of grammar]