Quran
وَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيبٌۖ أُجِيبُ دَعۡوَةَ ٱلدَّاعِ إِذَا دَعَانِۖ فَلۡيَسۡتَجِيبُواْ لِي وَلۡيُؤۡمِنُواْ بِي لَعَلَّهُمۡ يَرۡشُدُونَ
And when My servants ask you, [O Muhammad], concerning Me – indeed I am near. I respond to the invocation of the supplicant when he calls upon Me. So let them respond to Me [by obedience] and believe in Me that they may be [rightly] guided.
[Surah Al-Baqarah 186]
Hadith
عَنْ جُبَيْرِ بْنِ نُفَيْرٍ، أَنَّ عُبَادَةَ بْنَ الصَّامِتِ، حَدَّثَهُمْ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ
مَا عَلَى الأَرْضِ مُسْلِمٌ يَدْعُو اللَّهَ بِدَعْوَةٍ إِلاَّ آتَاهُ اللَّهُ إِيَّاهَا أَوْ صَرَفَ عَنْهُ مِنَ السُّوءِ مِثْلَهَا مَا لَمْ يَدْعُ بِمَأْثَمٍ أَوْ قَطِيعَةِ رَحِمٍ ” . فَقَالَ رَجُلٌ مِنَ الْقَوْمِ إِذًا نُكْثِرَ . قَالَ ” اللَّهُ أَكْثَرُ ”
رواه الترمذي ٣٥٧٣ وقال هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ
Jubair bin Nufair narrated that `Ubadah bin As-Samit narrated to them that, the Messenger of Allah (ﷺ) said:
“There is not a Muslim upon the earth who calls upon Allah with any supplication, except that Allah grants it to him, or he turns away from him the like of it in evil; as long as he does not supplicate for something sinful, or the severing of the ties of kinship.”
So a man from the people said:
“What if we should increase (in it)”He (ﷺ) said: “(With) Allah is more.”
Jami` at-Tirmidhi 3573