The Prophet ﷺ said, "Supplication is the essence of worship."
حدثنا علي بن حجر أخبرنا الوليد بن مسلم عن ابن لهيعة عن عبيد الله بن أبي جعفر عن أبان بن صالح
عن النبي ﷺ قال الدعاء مخ العبادة
No references are available.
[Its isnad is daif] Tabarani narrated it in al-Awsat, no. 3220, from the hadith of Ibn Lahia through this route, and he said, "Only Abdullah bin Lahia narrated it." * Abdullah bin Lahia is a mudallis and he narrated using "an" (indicating possible concealment of a defect in the chain).