Gladys Knight And The Pips were a U.S. r&b and soul group from Atlanta, Georgia. It was a family group fronted by Gladys, backed by her siblings and cousins. They had a long, successful career beginning in the early 1950s, and are perhaps best known for this 1973 classic. Here's Midnight Train To Georgia:
https://youtu.be/A0F9lh8TiSM?si=bGHTH03dwhw6psgi