Yes, Jehovah has guaranteed peace for all of his obedient servants. The fruitage of his spirit is evident among them.
فَثَمَرُ رُوحِهِ ظَاهِرٌ بَيْنَهُمْ ،‏ مَا يَضْمَنُ ٱلسَّلَامَ لِجَمِيعِ خُدَّامِهِ ٱلطَّائِعِينَ .‏