(Al-Hajj) 22 : 16
وَكَذَٰلِكَ أَنْزَلْنَاهُ آيَاتٍ بَيِّنَاتٍ وَأَنَّ اللَّهَ يَهْدِي مَنْ يُرِيدُ
And just like that We have sent down the Clear verses, indeed Lord Allah guides whom He intends.
Today, Impartial Lord has codified Adhikr through the Three-Time-Knower mentioned in verse 25: 59. So without testifying It nobody can become a believer as explained in verses 10: 100 and 108. See explanation 25: 29 and 33-34.