President Donald Trump faced backlash after critics noted that he did not place his hand on the Bible during his inauguration on Monday, raising questions about the tradition’s significance during the formal ceremony.

Trump took the oath of office on Monday immediately after Vice President JD Vance was sworn in by Associate Supreme Court Justice Brett Kavanaugh. As Vance took the oath of office, he placed his right hand on a Bible that was held by his wife, Usha Vance, as she also held one of their three children.