Shiva Purana
एकदा खलु तद्गर्भो गरेणैव सह च्युतः ॥ सुमुहूर्त्ते सुलग्ने च पंचोच्चग्रहसंयुते ॥ ३६ ॥
Once when the Muhūrta and the Lagna were good when the five planets were ascendant the child was born along with the poison administered to the queen.
english translation
ekadA khalu tadgarbho gareNaiva saha cyutaH ॥ sumuhUrtte sulagne ca paMcoccagrahasaMyute ॥ 36 ॥
hk transliteration by Sanscript