ABC’s Avery Miller reports President Obama and Supreme Court Chief Justice John Roberts signed Martin Luther King, Jr.’s Bible today, at the request of the family.

In his life time, it was King’s “traveling Bible,” according to the Presidential Inaugural Committee.

“An avid reader who was constantly on the road, Dr. King typically traveled with a selection of books that included this Bible,” the PIC wrote in a statement about the Bible written when they announced Obama would use it in his ceremony. “It was used for inspiration and preparing sermons and speeches, including during Dr. King’s time as pastor of Dexter Avenue Baptist Church in Montgomery, Alabama.”