Seven sages like Vishwamitra etc. were born from the body of Indrarupi Prajapati. Eight sages, such as Balkhilya, were born from the upper part of Prajapati's body. Bhrigu etc. born from the previous part of the nine sage Prajapatis. The sages like Angira etc. originated from the foreground. All these sages increase the higher parts of the jhuloka which are part of the yajnansh. 