(Al-An'aam) 6 : 155
وَهَٰذَا كِتَابٌ أَنْزَلْنَاهُ مُبَارَكٌ فَاتَّبِعُوهُ وَاتَّقُوا لَعَلَّكُمْ تُرْحَمُونَ
And this is a Blessed Book We have sent down It, then you follow It and you become heedful so that you may receive the Mercy.
Adhikr is the Blessed Book, the safeguard of which is undertaken by the Lord of the universe as explained in verse 6: 92. It is the greatest Bounty and Mercy of the Impartial Lord. It is asked through verse 25: 50: "Adhikr is a Blessed Reminder Which Lord has sent down, then are you hating It?". See explanation 2: 152, and 7: 157-158.