‘Abdallah b. ‘Amr b. al-‘As reported God's Messenger as saying, “When you hear the <i>mu’adhdhin</i> repeat what he says, then invoke a blessing on me, for everyone who invokes one blessing on me will receive ten blessings from God. Then ask God to give me the <i>wasila</i>, which is a rank in paradise fitting for only one of God’s servants, and I hope that I may be the one. If anyone asks that I be given the <i>wasila</i>, he will be assured of my intercession.” Muslim transmitted it.

وَعَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ أَنَّهُ سَمِعَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: " إِذَا سَمِعْتُمُ الْمُؤَذِّنَ فَقُولُوا مِثْلَ مَا يَقُولُ ثُمَّ صَلُّوا عَلَيَّ فَإِنَّهُ مَنْ صَلَّى عَلَيَّ صَلَاةً صَلَّى اللَّهُ عَلَيْهِ بِهَا عَشْرًا ثُمَّ سَلُوا اللَّهَ لِيَ الْوَسِيلَةَ فَإِنَّهَا مَنْزِلَةٌ فِي الْجَنَّةِ لَا تَنْبَغِي إِلَّا لِعَبْدٍ مِنْ عِبَادِ اللَّهِ وَأَرْجُو أَنْ أَكُونَ أَنَا هُوَ فَمَنْ سَأَلَ لِيَ الْوَسِيلَةَ حَلَّتْ عَلَيْهِ الشَّفَاعَةُ. رَوَاهُ مُسلم