Brahman said-This dreadful sin has possessed Indra on account of his having killed Vritra. Take you a fourth part of Brahmanicide.
ब्रह्मोवाच इयं वृत्रादनुप्राप्ता पुरुहूतं महाभया। ब्रह्मवध्या चतुर्थांशमस्या यूयं प्रतीच्छत॥