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suyuti:10784a
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السيوطي:١٠٧٨٤a

"الدُّعَاءُ مُخُّ العبَادة".  

[ت] الترمذي غريب، وأبو الشيخ عن أنس

See similar narrations below:

Collected by Tirmidhī
tirmidhi:3371ʿAlī b. Ḥujr > al-Walīd b. Muslim > Ibn Lahīʿah > ʿUbaydullāh b. Abū Jaʿfar > Abān b. Ṣāliḥ > Anas b. Mālik

the Prophet said: “The supplication is the essence of worship.”  

الترمذي:٣٣٧١حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ أَخْبَرَنَا الْوَلِيدُ بْنُ مُسْلِمٍ عَنِ ابْنِ لَهِيعَةَ عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي جَعْفَرٍ عَنْ أَبَانَ بْنِ صَالِحٍ عَنْ أَنَسِ بْنِ مَالِكٍ

عَنِ النَّبِيِّ ﷺ قَالَ الدُّعَاءُ مُخُّ الْعِبَادَةِ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ لاَ نَعْرِفُهُ إِلاَّ مِنْ حَدِيثِ ابْنِ لَهِيعَةَ