There is no expiation for men who follow the ordinances laid down in the scriptures. The Shruti says that expiation exists for only men who are weak and unable to follow the absolute provisions of the sacred law.
तस्मिन् विधौ स्थितानां हि प्रायश्चित्तं न विद्यते। दुर्बलात्मन उत्पन्न प्रायश्चित्तमिति श्रुतिः॥