Without performing his ablutions Brahmana should not recite his evening prayers nor engage in religious meditation, nor take his food a second time. By so doing he is purified.
न च संध्यामुपासीत न च जाप्यं प्रवर्तयेत्। न संकिरेत् तदन्नं च ततः पूयेत ब्राह्मणः॥