Sura 2 Al-Baqarah (The Cow), aya 186

1. وَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيبٌ ۖ أُجِيبُ دَعْوَةَ الدَّاعِ إِذَا دَعَانِ ۖ فَلْيَسْتَجِيبُوا لِي وَلْيُؤْمِنُوا بِي لَعَلَّهُمْ يَرْشُدُونَ

   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.

   2:186

Tafsiri: Saheeh International