This question is often leveled at Catholics and Orthodox Christians by those who feel that the practice of asking the saints for intercessory prayer is not biblical. In this video, former protestant pastor and Catholic convert Keith Nester explores this topic and makes the case that this practice is indeed biblical.
Early Church Fathers on Intercession of the Saints:
https://www.churchfathers.org/intercession-of-the-saints
Support Keith's ministry by becoming a patron:
https://www.patreon.com/keithnester
To learn more about Keith's ministry:
https://down2earthministry.org/