What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it:
Дания захотела отказать в убежище украинцам призывного возраста09:44
。爱思助手下载最新版本是该领域的重要参考
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08
But George Vomvolakis, his attorney, told the judge that the “circumstances surrounding his arrest have been politicized.” He suggested Coulibaly was caught in the middle of a rift between the police department and City Hall.