When your belief feels weak or doubt enters your mind, say this -
هُوَ الْأوَّلُ وَالْآخِرُ وَالظَّاهِرُ وَالْبَاطِنُ وَهُوَ بِكُلِّ شَيْءٍ عَلِيمٌ
Transliteration
Huwal-'Awwalu wal-'Aakhiru wadh-Dhaahiru wal-Baatinu, wa Huwa bikulli shay'in 'Aleem
Translation
He is the First and the Last, the Most High and the Most Near. And He is the Knower of all things. (Sura Al-Hadid 57:3)
حَدَّثَنَا عَبَّاسُ بْنُ عَبْدِ الْعَظِيمِ، حَدَّثَنَا النَّضْرُ بْنُ مُحَمَّدٍ، حَدَّثَنَا عِكْرِمَةُ، - يَعْنِي ابْنَ عَمَّارٍ - قَالَ حَدَّثَنَا أَبُو زُمَيْلٍ، قَالَ سَأَلْتُ ابْنَ عَبَّاسٍ فَقُلْتُ مَا شَىْءٌ أَجِدُهُ فِي صَدْرِي قَالَ مَا هُوَ قُلْتُ وَاللَّهِ مَا أَتَكَلَّمُ بِهِ . قَالَ فَقَالَ لِي أَشَىْءٌ مِنْ شَكٍّ قَالَ وَضَحِكَ . قَالَ مَا نَجَا مِنْ ذَلِكَ أَحَدٌ - قَالَ - حَتَّى أَنْزَلَ اللَّهُ عَزَّ وَجَلَّ { فَإِنْ كُنْتَ فِي شَكٍّ مِمَّا أَنْزَلْنَا إِلَيْكَ فَاسْأَلِ الَّذِينَ يَقْرَءُونَ الْكِتَابَ مِنْ قَبْلِكَ } الآيَةَ قَالَ فَقَالَ لِي إِذَا وَجَدْتَ فِي نَفْسِكَ شَيْئًا فَقُلْ { هُوَ الأَوَّلُ وَالآخِرُ وَالظَّاهِرُ وَالْبَاطِنُ وَهُوَ بِكُلِّ شَىْءٍ عَلِيمٌ }
Translation
Narrated Abdullah ibn Abbas: AbuZumayl said: I asked Ibn Abbas, saying: What is that I find in my breast? He asked: What is it? I replied: I swear by Allah, I cannot speak about it. He asked me: Is it something doubtful? and he laughed. He then said: No one could escape that, until Allah, the exalted, revealed: "If thou went in doubt as to what we have revealed unto thee, and ask those who have been reading the Book from before thee." He said: If you find something in your heart, say: He is the first and the Last, the Evident and the Immanent, and He has full knowledge of all things. [Hasan (Albani). Abu Dawud: 5110]
These words remind us: Allah has all power and is always close. Hearts become strong in Islamic faith. Peace fills every part of life.
Rabbana ighfir lana dhunubana is the prayer for strong faith. Ask Allah to forgive you. Ask Him to keep you on His way.
Remember Allah a lot. Read Quran. Pray on time. Stay with good people. Say dua for guidance every day. This is how belief grows.
Pray with focus. Read Quran and think about it. Say dua for guidance daily. Your faith will get better and stay strong.
Allah is the First, the Last, the Seen, and the Hidden. He knows all things. He is in every place, always.
Surah Rahman brings peace. The heart feels better. Its words show Allah's gifts. You feel close to Him.