Brihat Samhita
मध्ये तमः प्रविष्टं वितमस्कं मण्डलं च यदि परितः । तन्मध्यदेशनाशं करोति कुक्ष्यामयभयं च ॥ ५-५१ ॥
If the middle of the eclipsed disc should be dark while the disc continues bright all round, the eclipse is known as Madhyatama (centrally dark)—annular eclipse: the Central Provinces will be afflicted with miseries, mankind will suffer from stomach pain and there will be fear in the land.
english translation
madhye tamaH praviSTaM vitamaskaM maNDalaM ca yadi paritaH । tanmadhyadezanAzaM karoti kukSyAmayabhayaM ca ॥ 5-51 ॥
hk transliteration by Sanscript