Sunnah.com reference : Book 16, Hadith 115English translation : Book 16, Hadith 1593Arabic reference : Book 16, Hadith 1550
Abu Hurairah (RAA) narrated that the Messenger of Allah (ﷺ) said:
“Nothing is more honorable before Allah than supplication.” Related by At-Tirmidhi with a full chain of narrators. Ibn Hibban and Al-Hakim graded it as Sahih;.
وَلَهُ مِنْ حَدِيثِ أَبِي هُرَيْرَةَ رَفَعَهُ: { لَيْسَ شَيْءٌ أَكْرَمَ عَلَى اَللَّهِ مِنَ الدُّعَاءِ }  وَصَحَّحَهُ اِبْنُ حِبَّانَ, وَالْحَاكِمُ .‏  1‏ .‏‏1 ‏- حسن.‏ رواه الترمذي (3370)‏، وابن حبان (870)‏ والحاكم (1 / 490)‏.‏