He fell to his knees. “A king who wins without hatred. A victory without a cry of pain from the defeated. The curse is broken!”
Centuries ago, Kavi had been cursed by a sage for his arrogance. “You praise kings for gold, not truth. Stand here as a mute tree until a king wins without a weapon, without anger, and without a single cry of pain.” sri rama vijaya book in kannada
It sounds like you're looking for the classic Kannada work Sri Rama Vijaya (ಶ್ರೀ ರಾಮ ವಿಜಯ) by the poet (also known as Kummara Valmiki). That book is a celebrated retelling of the Ramayana in the Shatpadi (six-line verse) meter. He fell to his knees
That night, back in Chitrakuta, the banyan tree shuddered. Its roots pulled free from the earth. Its bark peeled away to reveal the trembling hands of the poet Kavi. The curse is broken
Ravana roared and attacked. Rama raised his bow—not in anger, but in mercy. He shot a single arrow. It did not scream through the air. It hummed like a forgotten hymn. It struck Ravana’s heart, and the demon fell, his face peaceful.
“Return Sita,” Rama said. “Not because I can kill you—but because holding her against her will has already killed the good within you.”