Skanda Purana 3.1.53.51

3.1.53.51

47 atha śrariāmacandrasya brahmahatyotpattihetuvarṇanaprasaṃgena rāvaṇādīnāṃ kaikasyāṃ sumāli-rākṣasakanyāyāṃ viśravaso muneḥ sakāśādutpattivṛttāntavarṇanam , evaṃ rāvaṇakumbha-karṇayorbrāhmaṇatvena rāmacandrasya taddhananādbrahmahatyāprāptau tannivṛttaye rāmacandreṇa setubandhe rāmeśvaraliṅgasthāpanam, brahmahatyāvimocanākhyatīrthaṃ nirmāya tatsamīpava-rtini bile brahmahatyāṃ prāpayya tadbilasyopari bhairavasthāpanam, rāmanāthamahāliṃgasya dakṣiṇabhāge girijāyāḥ sthitiḥ, āsamaṃtātparivāradigdevatānāṃ ca sthāpanam, rāmeśvaraliṅgapūjāsevārtha rāmacaṃdreṇa brāhmaṇānāmagrahārādivṛttipradānam. 88 1

47. Now, in connection with the description of the cause of the origin of the sin of killing a brahmin for the blessed Rāmacandra, the account of the birth of Rāvaṇa and others from the sage Viśravas in Kaikasī, the daughter of the rākṣasa Sumālin, is described; thus, since Rāvaṇa and Kumbhakarṇa were brahmins, Rāmacandra incurred the sin of killing a brahmin by slaying them, and to remove it, Rāmacandra installed the Rāmeśvara-liṅga at the Setubandha; having created the tīrtha named Brahmahatyāvimocana, he made the sin of killing a brahmin enter a cavern situated near it and established Bhairava above that cavern; the presence of Girijā to the south of the great Rāmanātha-liṅga; and the installation of the retinue and directional deities all around; Rāmacandra granted agrahāras and other endowments to brahmins for the worship and service of the Rāmeśvara-liṅga. 88 1