Phaladeepika
आद्वादशाब्दान्नरयोनिजन्मना- मायुष्कला निश्चयितुं न शक्यते मात्रा च पित्रा कृतपापकर्मण बालग्रहैर्नशमुपैति बालकः ॥ ३॥
In the case of viviparous creatures, it is not possible to determine the period of life within the first twelve years. In consequence of the sinful acts of the parents (whether in this or in a previous birth), the child meets with destruction being seized by demons called Balagrahas.
english translation
AdvAdazAbdAnnarayonijanmanA- mAyuSkalA nizcayituM na zakyate mAtrA ca pitrA kRtapApakarmaNa bAlagrahairnazamupaiti bAlakaH ॥ 3॥
hk transliteration by Sanscript