When Dadhyanca awards you his body, Visvakarma will prepare a thunderbolt from his bones. This thunderbolt will certainly kill Vrtrasura because it will be invested with My power

Expressions researched:
"When Dadhyanca awards you his body, Visvakarma will prepare a thunderbolt from his bones. This thunderbolt will certainly kill Vrtrasura because it will be invested with My power"

Srimad-Bhagavatam

SB Canto 6

When Dadhyanca awards you his body, Visvakarma will prepare a thunderbolt from his bones. This thunderbolt will certainly kill Vrtrasura because it will be invested with My power.

SB 6.9.54, Translation

When the Aśvinī-kumāras beg for Dadhyañca's body on your behalf, he will surely give it because of affection. Do not doubt this, for Dadhyañca is very experienced in religious understanding. When Dadhyañca awards you his body, Viśvakarmā will prepare a thunderbolt from his bones. This thunderbolt will certainly kill Vṛtrāsura because it will be invested with My power.