The Best Dhikr of Allah.

Path to Piety

The Best Dhikr 

The cherished Prophet صَلَّى اللهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم said:
اَفْضَلُ الذِّكْرِ لَا اِلٰهَ اِلَّا اللهُ وَاَفْضَلُ الدُّعَاءِ اَلْحَمْدُ لِلهِ
"لَا اِلٰهَ اِلَّا اللهُ is the best dhikr, and اَلْحَمْدُ لِلهِ is the best supplication."[1]
لَا اِلٰهَ اِلَّا اللهُ alludes to the whole kalima ṭayyiba (Unadulterated Explanation), including muḥammadur rasūlallāh. Monotheistic skeptics and even Iblis would discuss لَا اِلٰهَ اِلَّا اللهُ, however that was sufficiently not to save them from the risks of incredulity. An individual must be a devotee when he adds muḥammadur rasūlallāh. This strong assertion makes the doubter a devotee and cleanses the core of profound ills. The heart stirs to the blend of Allah's glorification and the Prophet's acclaim. Subsequently, it is the most prevalent dhikr. The respectable Sufis hailed the kalimah a solution for

cleansing the heart.[2]
Discussing the kalimah multiple Times
Sayyidunā Shaykh Muḥy al-Dīn ibn ʿArabī رَحْمَةُ الـلّٰـهِ عَـلَيْـه said:
This hadith contacted me:
مَنۡ قَالَ لَا اِلٰهَ اِلَّا اللهُ سَبۡعِيۡنَ اَلۡفًا غُفِرَ لَهٗ وَمَنۡ قِيۡلَ لَهٗ غُفِرَ لَهٗ اَيۡضًا
"The person who discusses لَا اِلٰهَ اِلَّا اللهُ multiple times will be pardoned, and the one for whom it is presented is additionally excused."
I had discussed the kalimah that multiple occasions however had no extraordinary expectation. Once, I was welcomed for a dinner for certain companions. One of the members was a young who had profound knowledge. As he was eating, he started to cry. I asked him what occurred, and he answered, "I see my mom dealing with repercussion." I then, at that point, gave the award of the kalimah I had recounted to his mom. The young fellow grinned without a moment's delay and said, "I presently see my mom in a superior spot… " I confirmed the legitimacy of the hadith from the otherworldly understanding of the adolescent, and I certified the profound knowledge of the adolescent from the legitimacy of the hadith.[3]

[1] Ibn Majah, vol. 4, p. 247, Hadith 3800
[2] Mirat ul Manajeeh, vol. 3, p. 342
[3] Mirat ul Manajeeh, vol. 3, p. 222