Al-Hafiz Ibn Taymiyyah said in his Fatawa (19:64): “It is permissible to write for the one afflicted [with the evil eye] and others of the sick something from the Book of Allah and His dhikr with permissible ink, and wash [the ink off the paper] and give it to drink, as Ahmad and others have explicated. ‘Abdullah ibn Ahmad said: ‘I read unto my father: Ya’la ibn ‘Ubayd narrated to us: Sufyan narrated to us: from Muhammad ibn Abi Layla: from al-Hakam: from Sa’id ibn Jubayr: from Ibn ‘Abbas (Allah be pleased with him): he said: When labour becomes difficult for a woman one should write: ‘In Allah’s name, there is no god but Allah, the Clement the Honourable. Glory to Allah Lord of the Magnificent Throne. All praise to Allah Lord of the Worlds. On the day when they behold it, it will be as if they had but tarried for an evening or the morn thereof (79:46), On the day when they behold what they were promised, it will be as if they had but tarried for an hour of a day, A clear message. Shall any be destroyed save evil-living folk? (46:35)’
“My father said: ‘Aswad ibn ‘Amir narrated to us with his chain [of narration] the same thing and he said: one writes [the ta’widh] in a clean vessel and gives it to drink’. My father said: ‘and Waki’ added in his narration: she is given to drink [from it] and it is sprinkled below her navel. ‘Abdullah said: I saw my father writing [a ta’widh] for a woman on a cup or something clean.'”
Ibn Taymiyyah (Allah have mercy on him) then transmitted this narration of Ibn ‘Abbas through another route, and he said at the end of it: “‘Ali (meaning Ibn al-Hasan, the nephew of the narrator of this narration) said: ‘one writes [the ta’widh] on paper and ties it around the upper arm of a woman’. ‘Ali said: ‘indeed we tried this and did not see anything more remarkable than it. When she delivered, it was quickly disposed of, by subsequently shredding it or burning it.'”
Also this from The Majlis of South Africa.