Then thou shalt remember thy ways, and be ashamed, when thou shalt receive {n} thy sisters, thy elder and thy younger: and I will give them to thee for daughters, but not {o} by thy covenant.

(n) By which he shows that among the most wicked, he always had some seed of his Church, which he would cause to bear fruit in due time: and here he declares how he will call the Gentiles.

(o) But of my free mercy.

Wesley's Notes

16:61 Then - When that new covenant shall take effect. Receive - Admit into church - communion, the Gentiles, now strangers, but then sisters. Thine elder - Those that are greater and mightier than thou; that by their power, wealth and honour are as much above thee as the elder children are above the younger. Thy younger - Thy lesser or meaner sister. For daughters - As daughters hearken to, and obey, so shall the Gentiles brought into the church, hearken to the word of God, which sounded out from Jerusalem. But not - Not by that old covenant which was violated; nor by external ceremonies, which were a great part of the first covenant, but by that covenant which writes the law in the heart, and puts the fear of God into the inward parts.

Jamieson-Fausset-Brown Bible Commentary

61. thou shalt remember-It is God who first remembers her before she remembers Him and her own ways before Him (Eze 16:60; Eze 20:43; 36:31).

ashamed-the fruit of repentance (2Co 7:10, 11). None please God unless those who displease themselves; a foretaste of the Gospel (Lu 18:9-14).

I will give them unto thee for daughters-(Isa 54:1; 60:3, 4; Ga 4:26, &c.). All the heathen nations, not merely Sodom and Samaria, are meant by "thy sisters, elder and younger." In Jerusalem first, individual believers were gathered into the elect Church. From Jerusalem the Gospel went forth to gather in individuals of the Gentiles; and Judah with Jerusalem shall also be the first nation which, as such, shall be converted to Christ; and to her the other nations shall attach themselves as believers in Messiah, Jerusalem's King (Ps 110:2; Isa 2:2, 3). "The king's daughter" in Ps 45:12-14 is Judah; her "companions," as "the daughter of Tyre," are the nations given to her as converts, here called "daughters."

not by thy covenant-This does not set aside the Old Testament in its spirit, but in its mere letter on which the Jews had rested, while they broke it: the latter ("thy covenant") was to give place to God's covenant of grace and promise in Christ who "fulfilled" the law. God means, "not that thou on thy part hast stood to the covenant, but that 'I am the Lord, I change not' (Mal 3:6) from My original love to thee in thy youth" (see Ro 3:3).

Matthew Henry's Concise Commentary

16:59-63 After a full warning of judgments, mercy is remembered, mercy is reserved. These closing verses are a precious promise, in part fulfilled at the return of the penitent and reformed Jews out of Babylon, but to have fuller accomplishment in gospel times. The Divine mercy should be powerful to melt our hearts into godly sorrow for sin. Nor will God ever leave the sinner to perish, who is humbled for his sins, and comes to trust in His mercy and grace through Jesus Christ; but will keep him by his power, through faith unto salvation.