Shringi cursed Parikshit to be bitten by Takshaka on the seventh day: 'iti langhita-maryadam takshakah saptame 'hani dankshyati sma kulangaram' (SB 1.18.37) — the 'thunderbolt of speech' hurled after touching the water of the Kaushiki. This is the occasion of the prophecy at SB 1.12.27. Direction: curser -> cursed. Evidence: EXPLICIT.
Shringi
शृङ्गी
Shringi was the highly effulgent boy son of the sage Shamika. At SB 1.18.32-37, playing with his companions, he heard that the king had offended his father; his eyes red with anger, he touched the water of the Kaushiki and hurled the 'thunderbolt of speech' — that on the seventh day Takshaka would bite Parikshit. That curse became the occasion of the Bhagavata itself, for within those seven days Shuka recited the whole of it to the king. His father refused to approve the act and called it the sin of an unripe understanding (SB 1.18.41, 47); the scripture thus judges the curse unjust in its own voice.
Śrīmad Bhāgavata Mahāpurāṇa 1.18.32 — Sanskrit Wikisource (pinned oldid=110189)