Malachi 3:17

“And they shall be mine, saith the Lord of hosts, etc.] That is, such as fear the Lord, and think of him, hereby they are known to be his; and hereafter, in the time referred to, it will be manifest that they are his: they are Christ’s already by his Father’s gift of them to him; by his own purchase; by the conquests of his grace; and by the voluntary surrender of themselves: but, in the last day, they will be claimed and owned by Christ before his Father and his holy angels; and they will be known to be his, by themselves and others; and there will be no doubt about it, or questioning of it: in that day when I make up my jewels; Christ has some, who are his jewels, or peculiar treasure, as…”

“jewels-- (Isa 62:3). Literally, "My peculiar treasure" (Exo 19:5; Deu 7:6; Deu 14:2; Deu 26:18; Psa 135:4; Tit 2:14; Pe1 2:9; compare Ecc 2:8). CALVIN translates more in accordance with Hebrew idiom, "They shall be My peculiar treasure in the day in which I will do it" (that is, fulfil My promise of gathering My completed Church; or, "make" those things come to pass foretold in Mal 3:5 above [GROTIUS]); so in Mal 4:3 "do" is used absolutely, "in the day that I shall do this." MAURER, not so well, translates, "in the day which I shall make," that is, appoint as in Psa 118:24. as . . . man spareth . . . son-- (Psa 103:18).”

“And they shall be Mine, saith the Lord of hosts, in that day when I make up My jewels - o the recurrence of the words, עשה אני אשר יום, Mal. 3:21. Hebrew (Malachi 4:3 in English), and the סגלה לי והייתםExo. 19:5; so that we have both phrases elsewhere. In Deuteronomy 7:6, there is the equivalent לעם לו להיות סגלה, and the like, Deuteronomy 14:2; Psalms 135:4.) or perhaps better, “And they shall be to Me, saith the Lord of hosts, in that day which I make (or, in which I do this) a special treasure.” “In the day of judgment, those who fear Me and believe and maintain My providence shall be to Me a special treasure, i. e., a people uniquely belonging and precious to Me, blessed in the vision…”

“Make up my jewels - This shall be fully made good in the last great day, and in heaven to eternal ages. I will spare them - In the mean time they shall be spared, pitied, preserved, and loved. Malachi 3:18”

“3:17 special treasure: Israel had a privileged status as God’s people; they were his private property.”

“they shall: Sol 2:16; Jer 31:33, Jer 32:38, Jer 32:39; Eze 16:8, Eze 36:27, Eze 36:28; Zac 13:9; Joh 10:27-30, Joh 17:9, Joh 17:10, Joh 17:24; Co1 3:22, Co1 3:23, Co1 6:20, Co1 15:23; Gal 5:24; Th2 1:7-10; Rev 20:12-15 jewels: or, special treasure, Exo 19:5; Deu 7:6, Deu 14:2, Deu 26:17, Deu 26:18; Psa 135:4; Isa 62:3, Isa 62:4; Tit 2:14; Pe1 2:9 and I: Neh 13:22; Psa 103:8-13; Isa 26:20, Isa 26:21; Jer 31:20; Zep 2:2; Mat 25:34; Rom 8:32; Co2 6:18; Jo1 3:1-3 son: Mal 1:6; Pe1 1:13-16 Malachi 3:18”