“As the Father knoweth Me, even so know I the Father: and I lay down My life for the sheep. And other sheep I have, which are not of this fold: them also I must bring, and they shall hear My voice; and there shall be one fold, one shepherd.” John 10:15-16 (KJB)
The current “Fold” of whom Jesus is speaking is the people of Israel. Only those who would hear Him, believe Him, and follow Him. In the days following His death for the fold there would be added to the fold or flock others from the Gentile world.
All would be under the authority, and leadership of one Shepherd. His name is Jesus who died to redeem a people unto Himself; both from Israel, and the surrounding nations.
Have you been redeemed? Are you in His fold?