The One who witnesses the saying and deeds of His creatures
Al Muhaymin is the one who ensures well being and protection over his creation. He is ever watchful and offers peace and security. He is the trustworthy one who proclaims truth.
Mentions From The Quran & Hadith
From the root h-y-m-n which has the following classical Arabic connotations: to watch over, oversee, protect, guard to be a witness to to offer security and peace to determine what is true to extend a wing (like a hen protecting her chicks)
He is Allah, other than whom there is no deity, the Sovereign, the Pure, the Perfection, the Bestower of Faith, the Overseer, the Exalted in Might, the Compeller, the Superior. Exalted is Allah above whatever they associate with Him. (Quran Surah Al-Hashr 59:23)
هُوَ اللَّهُ الَّذِي لَا إِلَٰهَ إِلَّا هُوَ الْمَلِكُ الْقُدُّوسُ السَّلَامُ الْمُؤْمِنُ الْمُهَيْمِنُ الْعَزِيزُ الْجَبَّارُ الْمُتَكَبِّرُ ۚ سُبْحَانَ اللَّهِ عَمَّا يُشْرِكُونَ ﴿٢٣﴾
And He is the subjugator over His servants, and He sends over you guardian-angels until, when death comes to one of you, Our messengers take him, and they do not fail [in their duties]. (Quran 6:61)
Surely, Allah is witness to all. This is explained in the following verse.
That Day, the people will depart separated [into categories] to be shown [the result of] their deeds. So whoever does an atom’s weight of good will see it, and whoever does an atom’s weight of evil will see it. (Quran 99:6-8)
يَوْمَئِذٍ يَصْدُرُ النَّاسُ أَشْتَاتًا لِّيُرَوْا أَعْمَالَهُمْ ﴿٦﴾ فَمَن يَعْمَلْ مِثْقَالَ ذَرَّةٍ خَيْرًا يَرَهُ ﴿٧﴾ وَمَن يَعْمَلْ مِثْقَالَ ذَرَّةٍ شَرًّا يَرَهُ ﴿٨﴾