April 3 (UPI) — Supreme Court Justice Samuel Alito was taken to a Philadelphia hospital after a Federalist Society dinner in his honor last month, the court confirmed Friday.

Alito “felt ill during an event in Philadelphia” on March 20, a Supreme Court spokesperson said in a statement to the media.

“Out of an abundance of caution, he agreed with his security detail’s recommendation to see a physician before the three-hour drive home,” spokeswoman Patricia McCabe said. “After that examination and the administration of fluids for dehydration, he returned home that night, as previously planned. Justice Alito was thoroughly checked by his own physician, and he returned to work the following Monday for oral argument.”

Alito, 76, is the court’s second-oldest justice. He was nominated by President George W. Bush in 2005.

Sources told ABC News that those who saw him at the event said he looked tired and was not as engaging as usual. They said he stayed seated when people came by to greet him during the dinner.

The dinner capped off a daylong symposium by the society titled, “An Examination of the Jurisprudence of Samuel Alito,” which featured several of his former law clerks, law professors and attorneys who practice before the court. It was at the University of Pennsylvania law school.

Alito was not there during the day, as he was driving from Washington. The court was in session to hand down opinions, but Alito was on the road.