Indra weakened

[thillaud at unice.fr]

Dear Indologist,
        I remember a story where Indra after killing Vrtra was weakened,
flight and hide in a reed. He go out only after an other god (Agni,
Brhaspati ?) find him and praise him. But, after some research, I was
unable to find te source of this story.
        Can someone help me (first and best versions) ?
Many thanks,


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Dominique Thillaud - Universite de Nice - Sophia Antipolis
email : thillaud at unice.fr