Manusmriti
न स्पृशेत् पाणिनोच्छिष्टो विप्रो गोब्राह्मणानलाण् । न चापि पश्येदशुचिः सुस्थो ज्योतिर्गणान् दिवा ॥ १४२ ॥
A Brahmana who is impure must not touch with his hand a cow, a Brahmana, or fire; nor, being in good health, let him look at the luminaries in the sky, while he is impure.
english translation
na spRzet pANinocchiSTo vipro gobrAhmaNAnalAN । na cApi pazyedazuciH sustho jyotirgaNAn divA ॥ 142 ॥
hk transliteration by Sanscript