Allah Subhanahu wa Ta’ala tells us in the Qur'an:
وَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيبٌ أُجِيبُ دَعْوَةَ الدَّاعِ إِذَا دَعَانِ فَلْيَسْتَجِيبُواْ لِى وَلْيُؤْمِنُواْ بِى لَعَلَّهُمْ يَرْشُدُونَ
And when My servants ask you (O Muhammad concerning Me, then answer them), I am indeed near (to them by My knowledge). I respond to the invocations of the supplicant when he calls on Me (without any mediator or intercessor). So let them obey Me and believe in Me, so that they may be led aright. (Surah Al-Baqarah 2: 186)
فَاذْكُرُونِى أَذْكُرْكُمْ وَاشْكُرُواْ لِي وَلاَ تَكْفُرُونِ
Therefore remember Me (by praying, glorifying). I will remember you, and be grateful to Me and reject not faith (Surah Al-Baqarah 2: 152)
يأَيُّهَا الَّذِينَ ءَامَنُواْ اذْكُرُواْ اللَّهَ ذِكْراً كَثِيراً
O you who believe! Remember Allah with much remembrance. (Surah Al-Ahzab 33: 41)
وَالذَكِـرِينَ اللَّهَ كَثِيراً وَالذَكِرَتِ أَعَدَّ اللَّهُ لَهُم مَّغْفِرَةً وَأَجْراً عَظِيماً
……And for men and women who engage much in Allah’s remembrance, for them has Allah prepared forgiveness and great reward (Surah Al-Ahzab 33:35 - the end of the Ayah)
وَللَّهِ الأَسْمَآءُ الْحُسْنَى فَادْعُوهُ بِهَا
And (all) the Most Beautiful Names belong to Allah, so call on Him by them, ….(Surah Al-A'raf 7: 180)
وَاذْكُر رَّبَّكَ فِي نَفْسِكَ تَضَرُّعًا وَخِيفَةً وَدُونَ الْجَهْرِ مِنَ الْقَوْلِ بِالْغُدُوِّ وَالاٌّصَالِ وَلاَ تَكُنْ مِّنَ الْغَـفِلِينَ
And remember your Lord within yourself, humbly and with fear and without loudness in words in the mornings and in the afternoons, and be not of those who are neglectful. (Surah Al-A’raf 7: 205)
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