Following the cue from Possible, I have tracked down the Spanish version to find out more about this source. Here is a list of the places cited for J28:
MATTHEW
1:20+ Ky; J3,4,7-14,16-18,22-24,28
1:22 Ky; J1-4,7-14,16-18,22-24,26,28
1:24 Ky; J1-4,7-14,16-18,22-24,28
2:13 Ky; J1-4,6-14,16-18,22-24,28
2:15 Ky; J1,3,4,6-14,16-18,22-24,28
2:19 Ky; J1-4,6-14,16-18,22-24,28
3:3 Ky; J1-4,7-14,16-18,20,22-24,26,28
4:7 Ky; J1-14,16-18,20,22-24,28
4:10 Ky; J1-14,16-18,20,22-24,28
5:33* Ky; J1-4,7-14,16-18,22,23,28
21:9 Ky; J1-14,16-18,20-24,28
21:42 Ky; J1-4,7-14,16-18,20-24,28
22:37 Ky; J1-14,16-18,20-24,28
22:44 Ky; J1-14,16-18,20-24,28
23:39 Ky; J1-14,16-18,21-24,28
27:10 Ky; J1-4,7-14,16,17,22-24,28
28:2 Ky; J1-4,7-13,16-18,22-24,28
MARK
1:3 Ky; J7-14,16-18,22-24,28
5:19* Ky; J7-10,17,18,22,28
11:9 Ky; J7,8,10-14,16-18,21-24,28
12:11 Ky; J7-14,16-18,21-24,28
12:29 Ky; J7-14,16-18,20-24,27,28
12:29 Ky; J7-14,16-18,20-24,28
12:30 Ky; J7-14,16-18,21-24,28
12:36 Ky; J7-14,16-18,21-24,28
13:20 Ky; J7,8,10,13,16-18,22-24,28
LUKE
1:6* Ky; J7-17,23,28
1:9* Ky; J7-18,22,23,28
1:11 Ky; J7-13,16-18,22-24,28
1:15 Ky; J7,8,10-18,22,23,28
1:16 Ky; J7-18,22-24,28
1:17 Ky; J7-18,22-24,28
1:25 Ky; J7-18,22,23,28
1:32 Ky; J5-18,22-24,28
1:38 Ky; J5,7-18,22-24,28
1:45 Ky; J5-18,22-24,28
1:46* Ky; J5-18,22,23,28
1:66 Ky; J5-18,22-24,28
1:68 Ky; J5-18,22-24,28
1:76 Ky; J5-18,22-24,28
2:9 Ky; J5,7,8,10-18,22-24,28
2:15* Ky; J5,7,8,10-18,22,23,28
2:22* Ky; J5-18,22,23,28
2:23 Ky; J5-18,22-24,28
2:23* Ky; J5-18,22,23,28
2:24 Ky; J5-18,22-24,28
2:26 Ky; J5-18,22-24,28
2:39 Ky; J5-18,22-24,28
3:4 Ky; J7-15,17,18,22-24,28
4:8 Ky; J7-18,22-24,28
4:12 Ky; J7-18,22-24,28
4:19 Ky; J7-18,20,22-24,28
5:17 Ky; J7-18,22-24,28
10:27 Ky; J5-18,21-24,28
13:35 Ky; J7-18,21-24,28
19:38 Ky; J7-18,21-24,28
20:37 Ky; J9,11-18,21-24,27,28
20:42 Ky; J7-18,21-24,28
JOHN
1:23 Ky; J5-14,16-19,22-24,28
12:13 Ky; J7-14,16-19,21-24,28
12:38 Ky; J7-14,16-20,22-24,28
ACTS
2:20 Ky; J7,8,10-18,20,22-24,28
2:21 Ky; J7,8,10-18,20,22-24,28
2:25* Ky; J7,8,10-18,20,22,23,28
2:34 Ky; J7,8,10-18,21-24,28
3:19* Ky; J13-18,22,23,28
3:22+ Ky; J7,8,10-18,20,22-24,28
4:26* Ky; J7,8,10-18,20,22,23,28
5:19 Ky; J7,8,10,13,15-18,22-24,28
7:31 Ky; J11-18,22-24,28
7:33* Ky; J11-18,22,23,28
7:49 Ky; J11-18,20,22-24,28
8:26 Ky; J7,8,10,13,15-18,22-24,28
8:39 Ky; J13,15-18,22-24,28
11:21 Ky; J7,8,10,13,15-18,22,23,28
12:7 Ky; J7,8,10,13,15-18,22-24,28
12:11* Ky; J7,8,10,13,15,16,18,23,28
12:17* Ky; J7,8,10,28
12:23 Ky; J7,8,10,13,15-18,22-24,28
13:10* Ky; J7,8,10,13,15-18,22,23,28
13:11 Ky; J7,8,10,15-18,22-24,28
13:49* Ky; J7,8,10,13,15-18,22,23,28
15:17* Ky; J11-18,22,23,28
15:17 Ky; J7,8,10-18,20,22-24,28
16:32+* Th; J7,8,10,17,18,22,23,28
ROMANS
9:29 Ky; J7,8,10-18,20,22-24,28
10:13 Ky; J7,8,10,13-18,22-24,28
11:34 Ky; J7,8,10,13-18,20,22-25,28
14:11 Ky; J7,8,10-18,22-25,28
15:11* Ky; J7,8,10-18,20,22,23,25,28
1 CORINTHIANS
1:31 Ky; J7,8,10-14,16-18,22-24,28
2:16 Ky; J13,14,16-18,22-24,28
3:20 Ky; J7,8,10-14,16-18,20,22-24,28
4:4 Ky; J7,8,10,17,18,23,24,28
4:19* Ky; J7,8,10,22,23,28
7:17+* Ky; J28
10:26* Ky; J7,8,10,11,13,14,16-18,20,22,23,28
14:21 Ky; J7,8,10-14,16-18,22-24,28
16:10 Ky; J7,8,10,13,14,16-18,24,28
2 CORINTHIANS
3:16 Ky; J7,8,13,14,16,22,24,28
3:17* Ky; J7,8,13,14,16,28
3:17 Ky; J7,8,13,14,16,22,24,28
3:18 Ky; J7,8,13,14,16,22,24,28
3:18 Ky; J7,8,13,14,16,22,24,28
6:17 Ky; J7,8,11-14,16-18,22-24,28
6:18 Ky; J7,8,11-14,16-18,22-24,28
10:17 Ky; J7,8,13,14,16-18,22-24,28
10:18* Ky; J7,8,13,14,16-18,22,23,28
EPHESEANS
2:21 Ky; J7,8,13,16-18,22-24,28
5:19* Ky; J7,8,13,16,23,28
COLOSENSES
3:22+* Ky; J18,22,28
2 TIMOTHY
2:19 Ky; J7,8,13,14,16-18,20,22-24,28
2:19 Ky; J18,22-24,28
HEBREWS
7:21 Ky; J3,7,8,11-18,20,22-24,28
8:8 Ky; J3,7,8,11-18,20,22-24,28
8:9 Ky; J3,7,8,11-18,20,22-24,28
8:10 Ky; J3,7,8,11-18,20,22,24,28
8:11* Ky; J3,7,8,11-18,20,22,23,28
10:16 Ky; J3,7,8,11-18,22-24,28
10:30 Ky; J3,7,8,11-18,20,22-24,28
12:5 Ky; J7,8,11-18,20,22-24,28
12:6 Ky; J3,7,8,11-18,20,22-24,28
JAMES
1:7* Ky; J7,8,13,14,16-18,22,23,28
3:9+* Ky; J18,23,28
4:10 Ky; J7,8,13,14,16-18,22,23,28
4:15* Ky; J7,8,13,14,16-18,22,23,28
5:4 Ky; J7,8,11-14,16-18,22-24,28
5:10 Ky; J7,8,13,14,16-18,22-24,28
5:11 Ky; J7,8,13,14,16,18,22-24,28
5:11* Ky; J7,8,13,14,16-18,22-24,28
1 PETER
3:12 Ky; J7,8,11-14,16-18,20,22-24,28
3:12 Ky; J7,8,11-14,16-18,20,22,24,28
2 PETER
2:9 Ky; J7,8,13,14,16-18,22-24,28
3:8 Ky; J7,8,13,14,16-18,22-24,28
3:9 Ky; J7,8,13,16-18,22-24,28
3:10 Ky; J7,8,13,16-18,22-24,28
JUDE
9+ Ky; J7,8,11-14,16-18,22-24,28
14 Ky; J7,8,13,14,16-18,22-24,28
REVELATION
1:8 Ky; J7,8,13,14,16-18,22-24,28
4:8 Ky; J7,8,11-14,16-18,22,24,28
4:11* Ky; J7,8,13,14,16,18,28
11:17 Ky; J7,8,13,14,16-18,22,23,28
15:3 Ky; J7,8,13,14,16-18,22,23,28
15:4 Ky; J7,8,13,14,16-18,22,23,28
16:7 Ky; J13,14,16-18,22,23,28
18:8+ Ky; J7,8,13,14,16-18,22-24,28
19:6 Ky; J7,8,13,14,16-18,22-24,28
21:22* Ky; J7,8,13,14,16-18,22,23,28
22:5 Ky; J7,8,11-14,16-18,22-24,28
22:6* Ky; J7,8,13,14,16-18,22,24,28
Beyond this, it is cited at:
Luke 2:38 (“Dios”,? AB; VgSyp,s: “el Señor”; J5,7-17,28: “Jehová”) = Jehovah
Acts 7:30 (“Un ángel”, P74?ABCVg; DSyp: “un ángel de[l] Señor”; J7,8,10-17,28: “el ángel de Jehová”) = the angel of Jehovah
Acts 7:37 (“Dios”,? ABVg; CSyp: “El Señor Dios”; J7,8,10-17: “Jehová su Dios”; J28: “Jehová Dios”) = Jehovah God
Acts 14:25 (“Palabra”, BD;? ACVgSyp: “palabra del Señor”; P74: “palabra de Dios”; J17,28: “palabra de Jehová”) = word of Jehovah
I wonder why they have not updated this source in English versions. After all, it does give them "confirmation" for 1 Cor. 7:17. Thank you Possible for looking into this for me.
Mebaqqer