Bhagavatapurana 5.6.3

5.6.3

_*
/0 tathā coktam
na kuryāt karhicit sakhyaṃ manasi hy anavasthite /
yad-viśrambhāc cirāc cīrṇaṃ caskanda tapa aiśvaram //

It is also observed thus:—

3. No body should ever enter into friendship with the changeful mind by trusting to it. The long accumulated Tapas of Iswara (Rudra) or Iswaras (Sowbhari and other great sages) was lost.