Narrated An-Numan bin Bashir (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said:� Verily, Supplication is worship.� [Reported by AI-Arbaa (The four) and AI-Tirmdhi, graded it Sahih (sound)].
Narrated Anas (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said:� Supplication is the Pith (essence) of worship.� [Reported by At-Tirmidhi with a full chain of narrators].
Narrated Abu Huraira (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said:� Nothing is more honorable (most liked ) before Allah (subhanahu wa ta'ala) than Supplication� [Reported by At-Tirmidhi, Ibn Hibban and Al-Hakim graded it Sahih].
From all the "Hadiths" above we see that Supplication is a type of worship and it is honorable to Allah or liked by Allah (subhanahu wa ta'ala).
