The earliest report with the blessing of oils seems inside the Apostolic Tradition, an early Christian document typically acknowledged to be dated right before 235 CE. Right now, consecrating the oils is intently tied to planning for Holy Saturday’s Easter Vigil, as 1000's are baptized into your Catholic Church https://liantong.com.tw/%e6%96%b0%e7%ab%b9%e6%88%bf%e5%b1%8b%e4%ba%8c%e8%83%8e%e8%b2%b8%e6%ac%be%e8%a9%b3%e7%b4%b0%e6%94%bb%e7%95%a5%ef%bc%9a%e6%8f%90%e4%be%9b%e8%b3%87%e9%87%91%e5%bd%88%e6%80%a7%e7%ae%a1%e7%90%86/