the Messenger of Allah ﷺ said, “There is no believing servant who supplicates for his brother behind his back except that the Angels say: May the same be for you.”
قَالَ رَسُولُ اللَّهِ ﷺ «مَا مِنْ عَبْدٍ مُسْلِمٍ يَدْعُو لأَخِيهِ بِظَهْرِ الْغَيْبِ إِلاَّ قَالَ الْمَلَكُ وَلَكَ بِمِثْلٍ.»
that he heard the Messenger of Allah ﷺ say, “He who supplicates for his brother behind his back (in his absence), the representative Angel [assigned] to him says: Amen, and it is for you also.”
أَنَّهُ سَمِعَ رَسُولَ اللَّهِ ﷺ يَقُولُ: «مَنْ دَعَا لأَخِيهِ بِظَهْرِ الْغَيْبِ، قَالَ الْمَلَكُ الْمُوَكَّلُ بِهِ: آمِينَ وَلَكَ بِمِثْلٍ.»
[Machine] I heard the Messenger of Allah ﷺ saying, "Verily, the supplication of a person is answered as long as he does not call for something sinful or for cutting off the ties of kinship, and he does not rush."
سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّهُ يُسْتَجَابُ لِلْمَرْءِ بِظَهْرِ الْغَيْبِ لِأَخِيهِ فَمَا دَعَا لِأَخِيهِ بِدَعْوَةٍ إِلَّا قَالَ الْمَلَكُ وَلَكَ بِمِثْلٍ
There is no believing servant who supplicates for his brother behind his back (in his absence) that the Angels do not say: The same be for you too. (Using translation from Muslim 2732a)
قَالَ رَسُولُ اللَّهِ ﷺ «مَا مِنْ مُسْلِمٍ يَدْعُو لِأَخِيهِ بِظَهْرِ الْغَيْبِ إِلَّا قَالَ الْمَلَكُ وَلَكَ بِمِثْلٍ وَلَكَ بِمِثْلٍ»
"مَنْ دَعَا لأَخِيه بظَهْر الْغَيب، قَال الْمَلَكُ الْمُوَكَّلُ بِهِ: آمين وَلَكَ بِمِثْلٍ".
"مَا مِنْ عَبْد مُسْلِمٍ يدْعُو لأَخِيهِ بِظَهْرِ الْغَيبِ إِلا قال الْملَكُ: وَلكَ بمِثْلٍ.
"مَا مِنْ مُسْلِمٍ يَدْعُو لأَخِيهِ بدَعْوةٍ بِظَهْرِ الْغَيبِ: اللَّهُمَّ أَخِى فُلانٌ فَاغْفِرْ لَهُ، إلا قَالتِ الْمَلائِكَةُ: آمِين وَلَكَ بِمِثْلٍ".