Brihat Samhita
सन्ध्याविकाराः परिवेषखण्डा नद्यः प्रतीपा दिवि तूर्यनादाः । अन्यच्च यत्स्यात्प्रकृतेः प्रतीपं तन्मण्डलैरेव फलं निगाद्यम् ॥ ३२-२६ ॥
Unnatural colors or distortions of the twilight (dawn/dusk), incomplete or fragmented haloes around the sun or moon, rivers flowing backward (upstream), and the sound of trumpets or celestial instruments heard from the sky; Whatever else appears that is contrary to the laws of Nature—all such phenomena should have their effects predicted according to the specific 'Mandala' (territory or planetary circle) in which they occur.
english translation
sandhyAvikArAH pariveSakhaNDA nadyaH pratIpA divi tUryanAdAH । anyacca yatsyAtprakRteH pratIpaM tanmaNDalaireva phalaM nigAdyam ॥ 32-26 ॥
hk transliteration by Sanscript