The earliest document in the blessing of oils seems from the Apostolic Tradition, an early Christian document frequently acknowledged being dated prior to 235 CE. Right now, consecrating the oils is carefully tied to preparation for Holy Saturday’s Easter Vigil, as 1000's are baptized into the Catholic Church in https://liantong.com.tw/%e6%83%b3%e8%be%a6%e7%90%86%e6%96%b0%e7%ab%b9%e6%88%bf%e5%b1%8b%e4%ba%8c%e8%83%8e%e8%b2%b8%e6%ac%be%ef%bc%9f%e8%81%af%e9%80%9a%e8%b2%b8%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e7%b0%a1%e5%96%ae%e7%94%b3/