SB 8.7.19
tad ugra-vegam disi disy upary adho
visarpad utsarpad asahyam aprati
bhitah praja dudruvur anga sesvara
araksyamanah saranam sadasivam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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 Siva [Sadasiva]. Feeling unsheltered and very much afraid, they sought shelter of him.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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 Sadasiva instead of intervening Himself. In this connection Srila Madhvacarya warns:
rudrasya yasaso ’rthaya
svayam visnur visam vibhuh
na sañjahre samartho ’pi
vayum coce prasantaye
Lord Visnu was competent to rectify the situation, 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.