In Du'a Jawthan
يَا سَالِمُ
O accorder of peace
Followed by "O Ruler/Judge" (Hakem)
Preceded by "and granter of mercy" (Rahem) (note: different then Raheem).
So God gives peace and took position as ruler/judge as a mercy from him.
Also:
O Master of peace and security,
ya dhal-am-ni wal-aman
يَا ذَا الأَمْنِ وَالأَمَانِ
Preceded by:
يَا ذَا الْفَضْلِ وَالإمْتِنَانِ
O Most gracious and obliging,
ya dhal-fadhli wal-im-tinan
So we his obligating is linked to want to establish peace and security, in the souls and in the land (outwardly).
In this note, his role as Momin (Securer):
اللَّهُمَّ إِنِّي أَسْألُكَ بِاسْمِكَ
O Allah, verily I beseech You in Your name:
allahumma in-ne as-aluka bis-mika
يَا مُؤْمِنُ يَا مُهَيْمِنُ
O Securer of safety, O Protector,
ya mu-minu ya muhaymin
يَا مُكَوِّنُ يَا مُلَقِّنُ
O Bestower of being, O Bestower of knowledge,
ya mukaw-winu ya mulaq-qin
يَا مُبَيِّنُ يَا مُهَوِّنُ
O Manifester, O Facilitator,
ya mubay-yinu ya muhaw-win
يَا مُمَكِّنُ يَا مُزَيِّنُ
O Provider of place, O Adorner,
ya mumak-kinu ya mu-zay-yin
يَا مُعْلِنُ يَا مُقْسِّمُ
O Proclaimer, O Distributor.
ya mua'-linu ya muq-s-sim
سُبْحَانَكَ يَا لا إلَهَ إلاّ أنْتَ
Praise be to You, there is no god but You,
subhanaka ya la ilaha illa anta
الغَوْثَ الغَوْثَ
[I beseech you for] relief, relief
al-ghawth al-ghawth
خَلِّصْنا مِنَ النّارِ يا رَبِّ.
Protect us from the Fire, O Lord.
khallisna minan-nari ya rabb
He is Proclaimer (reveals divine books to humanity) part of his role Protector and Security giver/establisher.
@Bird123 I would see this Du'a:
Duaa Jawshan Kabeer - Ramadan - Duas.org