Kaushitakagrihyasutra 5.3.30

5.3.30

devasya savituḥ pavitraṃ sahasradhāraṃ vitatamantarikṣe yenāpunadindramanārtamārtyai tenāhaṃ sarvatanuṃ punāmi ityanumantrya etān pṛthag jaghanyaḥ śākhe vyatyasyet \30\

Having recited over them: 'The strainer of the divine Savitṛ, with a thousand streams, spread in the atmosphere, / by which he purified Indra free from distress for suffering, / with that I purify my whole body', the last one should cross the branches separately.