Donald Trump raised his right hand while placing his left hand on the Bible Monday afternoon. He then took the oath of office and was sworn in as the 47th President of the United States.

The tradition of swearing the oath of office on a Bible stretches back to George Washington, but not all presidents have observed it.

President Trump's family wasn't in place as the oath of office began, including his wife, Melania, who was holding two Bibles.

During his 2017 inauguration, Trump used both a family Bible and the so-called Lincoln Bible, belonging to America’s 16th president. In 2021, Biden used a family Bible that date

Some presidents did not use a Bible to take the oath of office, including Theodore Roosevelt, who did not use anything when he was sworn into office in 1901, and John Quincy Adams, who chose a legal book for his 1825 swearing-in, to signify his responsibility to uphold the U.S. constitutional law.

Some social media users wondered if Donald Trump not taking the oath on a religious text meant he wasn't properly sworn in.

U.S. President Donald Trump took his oath of office on Monday with his right hand raised, but without placing his left hand on the two Bibles that his wife Melania held as she stood by his side. The apparent oversight has no practical impact,