Brihat Parashara Hora Shastra
राहुणा संयुते मन्दे सर्वदा रोगसंयुतः । रोगस्थानगते भौमे तदीशे रंध्रसंयुते ॥ १४॥
One will suffer from (severe) fever at the age of 6 and at the age of 12, if Mangal is in Ari, while Ari Lord is in Randhr.
english translation
rAhuNA saMyute mande sarvadA rogasaMyutaH । rogasthAnagate bhaume tadIze raMdhrasaMyute ॥ 14॥
hk transliteration by Sanscript