In the 4 gospels Jesus told Peter to feed His Sheep and Lambs. These were the Jews who were His people.
Today, under grace, the children of God are not His Sheep or Lambs. We are "the body of Christ" and sons of God. As sons we are heirs of God and joint heirs with Christ.
Rom 8:15-17
15 For you did not receive the spirit of bondage again to fear, but you received the Spirit of adoption by whom we cry out,"Abba, Father."
16 The Spirit Himself bears witness with our spirit that we are children of God,
17 and if children, then heirs — heirs of God and joint heirs with Christ, if indeed we suffer with Him, that we may also be glorified together.
NKJV
Eph 4:14-16
14 that we should no longer be children, tossed to and fro and carried about with every wind of doctrine, by the trickery of men, in the cunning craftiness of deceitful plotting,
15 but, speaking the truth in love, may grow up in all things into Him who is the head — Christ —
16 from whom the whole body, joined and knit together by what every joint supplies, according to the effective working by which every part does its share, causes growth of the body for the edifying of itself in love.
NKJV
Today, under grace, the children of God are not His Sheep or Lambs. We are "the body of Christ" and sons of God. As sons we are heirs of God and joint heirs with Christ.
Rom 8:15-17
15 For you did not receive the spirit of bondage again to fear, but you received the Spirit of adoption by whom we cry out,"Abba, Father."
16 The Spirit Himself bears witness with our spirit that we are children of God,
17 and if children, then heirs — heirs of God and joint heirs with Christ, if indeed we suffer with Him, that we may also be glorified together.
NKJV
Eph 4:14-16
14 that we should no longer be children, tossed to and fro and carried about with every wind of doctrine, by the trickery of men, in the cunning craftiness of deceitful plotting,
15 but, speaking the truth in love, may grow up in all things into Him who is the head — Christ —
16 from whom the whole body, joined and knit together by what every joint supplies, according to the effective working by which every part does its share, causes growth of the body for the edifying of itself in love.
NKJV