Srila Madhvacarya warns: (rudrasya yasaso) Lord Visnu was competent to rectify the situation, (of consuming poison) but in order to give credit to Lord Siva, who later drank all the poison and kept it in his neck, Lord Visnu did not take action

Expressions researched:
"Lord Viṣṇu was competent to rectify the situation, but in order to give credit to Lord Śiva, who later drank all the poison and kept it in his neck, Lord Viṣṇu did not take action."

Srimad-Bhagavatam

SB Canto 8

Srila Madhvacarya warns: (rudrasya yasaso..) Lord Visnu was competent to rectify the situation, (of consuming poison) but in order to give credit to Lord Siva, who later drank all the poison and kept it in his neck, Lord Visnu did not take action.

SB 8.7.19, Translation and Purport

O King, when that uncontrollable poison was forcefully spreading up and down in all directions, all the demigods, along with the Lord Himself, approached Lord Śiva [Sadāśiva]. Feeling unsheltered and very much afraid, they sought shelter of him.

One may question that since the Supreme Personality of Godhead was personally present, why did He accompany all the demigods and people in general to take shelter of Lord Sadāśiva, instead of intervening Himself. In this connection Śrīla Madhvācārya warns:

rudrasya yaśaso 'rthāya

svayaṁ viṣṇur viṣaṁ vibhuḥ

na sañjahre samartho 'pi

vāyuṁ coce praśāntaye

Lord Viṣṇu was competent to rectify the situation, but in order to give credit to Lord Śiva, who later drank all the poison and kept it in his neck, Lord Viṣṇu did not take action.