Shall I inform you about the most beloved words by Allah? They are: Glory belongs to Allah and praise is due to Him
Authentic hadithعن أبي ذر الغفاري رضي الله عنه عن النبي صلى الله عليه وسلم قال: «ألاَ أُخْبِرُكَ بِأَحَبِّ الكَلاَمِ إِلَى اللهِ؟ إنَّ أَحَبَّ الكلام إِلى الله: سبحان اللهِ وبحمدِهِ».
Abu Dharr al-Ghifāri (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Shall I inform you about the most beloved words by Allah? Verily, the most beloved words by Allah are: Glory belongs to Allah and praise is due to Him."
Explanation
This Hadīth indicates that glorification of Allah is the most beloved words by Him. When a person glorifies the Almighty Lord, he declares Him far above any like, imperfection, or distorted names that do not befit Him. "Bihamdih" (praise is due to Him) is an admission that a person’s glorification of his Lord is in itself a favor from Him. Hence, “glory belongs to Allah and praise is due to Him” are the dearest words to Allah, for they involve exaltation of Him, declaring Him far above any imperfection, and praising Him for His boundless favors.
Source · Narrated by Muslim
From the Hadith Encyclopedia (hadeethenc.com).