Strengthening One's Weak Eeman

Assalamualaikum
My husband is struggling with his eeman. He prays five times a day, he knows that there is only one god i.e. ALLAH but the fear is not there. If he misses a prayer he takes it lightly. If there is a tough situation I have to really ask him to seek help from Allah. He wants to know what he could do to enlight his eeman? What should one do to fear and love Allah at the same time? What should he read or do?

بِسْمِ اللهِ الرَّحْمٰنِ الرَّحِيْمِ
الجواب وباللہ التوفیق
Walaikumassalam Warahmatullahi Wabarakatuhu Read 11 times durood shareef at the beginning and at the end and recite the following, 534 times: یا ہادی یا رشید  Then make dua to Allah Subhanahu Wa Ta‘ala. While you are reciting it, keep your goal and aim in your mind, InshahAllah your goal will be achieved. Wassalam

Fatawa ID: 230

فقط واللہ اعلم بالصواب