The Messenger of Allah ﷺ said, "Nothing is more honorable to Allah than supplication."
حدثنا سليمان بن داود حدثنا عمران عن قتادة عن سعيد بن أبي الحسن
أن رسول الله ﷺ قال ليس شيء أكرم على الله من الدعاء
Its isnad is sahih. Imran, here and in the two before it, is Imran bin Dawwar Qattan, who is trustworthy. It says in Tahdheeb, 8:132, "Aqeeli cited on his authority, from Qatada, from Saeed bin Abu Hasan, from Abu Hurairah, the hadith, 'Nothing is more honored by Allah than supplication.' He said, it is not corroborated with this wording, and it is not known except through him," end of quote, meaning it is not known except through Imran.Bukhari related it in Al-Adab, and Tirmidhi, and Hakim, from Abu Hurairah, and it is a sahih hadith.