upatasthuḥ samāhitāḥ

tatah-thereafter; te-they (the demigods); vismitah-being struck with wonder; sarve-all; visannah-being very morose; grasta-tejasah-having lost all their personal strength; pratyancam-to the Supersoul; adi-purusam-the original person; upatasthuh-prayed; samahitah-all gathered together.