स ऐक्षत यदि वा इममभिमंस्येकनीयोऽन्नं करिष्य इति स तया वाचा
In plain words
He pondered: 'If I overpower this being, I will make my food all the smaller.' And so with that very speech...
Close to the Sanskrit
He reflected: 'If indeed I shall overwhelm this one, I shall make food smaller'; he by that speech...