Isaiah 66:10

Rejoice ye with Jerusalem, and be glad with her,.... The church; she bringing forth so many spiritual children to Christ; just as, when a woman is delivered of a child, her friends and neighbours congratulate her upon it, and rejoice with her on that account; as Elisabeth's neighbours and relations did, at the birth of John the Baptist, Luke 1:57, so the church's friends here are called together to rejoice with her, at the numerous birth and conversion of souls in her, than which nothing is more joyful to the saints; see

Luke 15:6:

all ye that love her; wish her well, and pray for her peace and prosperity; all that love God love his church, the habitation of his house, the place where his honour dwells; all that love Christ love her who is his spouse and bride, and purchased by his blood; all that love the word and ordinances love the church where they are administered:

rejoice for joy with her, all ye that mourn for her; that had mourned for her, when things went ill with her; these are they that mourn in Zion, and for Zion, because of the sins of her professors; corruptions in doctrine, discipline, and worship; declensions in grace; want of love to one another, and few instances of conversion: but now things being the reverse, and it going well with her, they are called upon to rejoice exceedingly with her; for such is the sympathizing spirit of the saints, that they rejoice with them that rejoice, and weep with them that weep, Romans 12:15.