 सर्वथा तु कृतं कष्टं सीतामुत्सृजता वने।प्रतिकर्तुं नृशंसानां रक्षसां दत्तमन्तरं।। 
 You have definitely done a great mistake by leaving Sita alone in the forest. This has given a chance to the cruel demons to wreak revenge. 