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;. (JA)
English reference (JA): Book 16, Hadith 1593 (JA)