Saṃskṛta-nāṭaka - Bhavabhūti (Part 5) - Uttara-rāma-carita
Uttara-kāṇḍa of the Rāmāyaṇa does not mention anything about the battle involving Lava and Kuśa; the Pātāla-khaṇḍa (adhyāyas 1-68) of the Padma-purāṇa speaks about the yajñāśva roaming around different lands. Moreover, as per the version that we come across in the purāṇa, Rāma and Sītā reunite and live happily ever after; thus, the story ends on a positive note, just like the play Uttara-rāma-carita.