Muwatta Malik, Book 50, Hadith 14 (USC-MSA)

Yahya related to me from Malik from Nafi that Abdullah ibn Umar cauterized for the palsy and he had a talisman made for a scorpion sting.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، اكْتَوَى مِنَ اللَّقْوَةِ وَرُقِيَ مِنَ الْعَقْرَبِ ‏.‏

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also referenced under: Book 50, Hadith 1727 (In-Book)