Śrīmad-Bhāgavatam 8.7.19
తదుగ్రవేగం దిశి దిశ్యుపర్యధో
విసర్పదుత్సర్పదసహ్యమప్రతి ।
భీతా: ప్రజా దుద్రువురఙ్గ సేశ్వరా
అరక్ష్యమాణా: శరణం సదాశివమ్ ॥ ౧౯ ॥
tad ugra-vegaṁ diśi diśy upary adho
[tad ugra-vegam dishi dishy upary adho]
visarpad utsarpad asahyam aprati
[visarpad utsarpad asahyam aprati]
bhītāḥ prajā dudruvur aṅga seśvarā
[bheetaah prajaa dudruvur anga seshvaraa]
arakṣyamāṇāḥ śaraṇaṁ sadāśivam
[arakshyamaanaah sharanam sadaashivam]
Word-for-word
tat
—
that
ugra-vegam
—
very fierce and potent poison
diśi diśi
—
in all directions
upari
—
upward
adhaḥ
—
downward
visarpat
—
curling
utsarpat
—
going upward
asahyam
—
unbearable
aprati
—
uncontrollable
bhītāḥ
—
being very much afraid
prajāḥ
—
the residents of all the worlds
dudruvuḥ
—
moved here and there
aṅga
—
O Mahārāja Parīkṣit
sa-īśvarāḥ
—
with the Supreme Lord
arakṣyamāṇāḥ
—
not being protected
śaraṇam
—
shelter
sadāśivam
—
unto the lotus feet of Lord Śiva.
Blended reading (Sanskrit + English inline)
tad ugra-vegaṁ diśi diśy upary adho
tat
that
ugra-vegam
very fierce and potent poison
diśi diśi
in all directions
upari
upward
adhaḥ
downward
visarpad utsarpad asahyam aprati
visarpat
curling
utsarpat
going upward
asahyam
unbearable
aprati
uncontrollable
bhītāḥ prajā dudruvur aṅga seśvarā
bhītāḥ
being very much afraid
prajāḥ
the residents of all the worlds
dudruvuḥ
moved here and there
aṅga
O Mahārāja Parīkṣit
arakṣyamāṇāḥ śaraṇaṁ sadāśivam
sa-īśvarāḥ
with the Supreme Lord
arakṣyamāṇāḥ
not being protected
śaraṇam
shelter
sadāśivam
unto the lotus feet of Lord Śiva.
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.
Purport
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 saṣjahre 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.
— A.C. Bhaktivedanta Swami Prabhupāda
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
O King! That most virulent poison spread in all directions as well as up and down. Seeing that intolerable poison with no cure, all the frightened devatās and demons, along with the Lord himself, took shelter of Śiva.
The poison spread in all directions and up and down as well. It spread slowly; otherwise the whole creation would be destroyed. Prajāḥ here refers to the devatās and demons. Normal persons could not quickly cross the ocean and go to Kailāsa. Seeing this poison which had no remedy (aprati), they became afraid. Having no protection they went to Śiva. The Supreme Lord did not act in this situation because he wanted to give fame to his devotee Śiva having the half-moon as his head ornament.
My note
Source: vedabase.io