عِبَادِ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – عِبَادِ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

العِبَادُ is the natural state of this definite noun and it becomes العِبَادِ due to: 1) a preposition that precedes it or 2) a possessed noun that precedes it or 3) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

العِبَادِ loses it’s definite article, becoming عِبَادِ due to it being a possessed noun

Human beings; Slaves; servants; Bondsmen; Worshippers

To serve, worship, adore, venerate, obey, accept the impression of a thing, submit, devote

Surah/Below are the 66 verses in the holy Quran containing the genitive nounعِبَادِ
Verse 
Miserable is the price they have sold their souls forبِئْسَمَا اشْتَرَوْا بِهِ أَنْفُسَهُمْ
that they disbelieve in what Allah (SWT) sent downأَنْ يَكْفُرُوْا بِمَا أَنْزَلَ اللهُ
grudging Allah (SWT) for granting His Grace to whomsoever He Willsبَغْيًا أَنْ يُنَزِّلَ اللهُ مِنْ فَضْلِهِ عَلَى مَنْ يَشَآءُ
of His servants so, they have drawn (earned) wrath upon wrathمِنْ عِبَادِهِ فَبَآءُو بِغَضَبٍ عَلَى غَضَبٍ 
2-90and for the disbelievers is a humiliating punishmentوَلِلْكَافِرِيْنَ عَذَابٌ مُّهِيْنٌ
and when My slave asks you about me then indeed, I am nearوَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيْبٌ
I respond to the invocation of the supplicant when he calls meأُجِيْبُ دَعْوَةَ الدَّاعِ إِذَا دَعَانِ
2-186so let them respond to Me and believe in Me so that they may be led arightفَلْيَسْتَجِيْبُوْا لِى وَلْيُؤْمِنُوْا بِى لَعَلَّهُمْ يَرْشُدُوْنَ
4-118
6-18
6-61
6-88
7-32
7-128
9-104
10-107
12-24
14-11
14-31
15-42
15-49
16-2
17-17
17-30
17-53
17-65
17-96
18-65
18-102
19-63
20-77
21-105
23-109
24-32
25-17
25-58
26-52
27-15
27-19
27-59
28-82
29-56
29-62
30-48
34-13
34-39
35-28
35-31
35-32
35-45
37-81
37-111
37-122
37-132
37-171
39-7
39-10
39-16
39-17
39-46
39-53
40-15
40-85
42-19
42-25
42-27
42-52
43-15
43-68
44-23
66-10
89-29Enter among the slaves of mineفَادْخُلِى فِي عِبَادِى