Praise be to Allaah.
Allaah is al-Mu’min, the One Who will fulfil the promise to the sincere. He calls His slaves to believe in Him and He has control over the security of His creation in this world and in the Hereafter. And He declares Himself to be One, as He says (interpretation of the meaning):
“Allaah bears witness that Laa ilaaha illa Huwa (none has the right to be worshipped but He)” [Aal ‘Imraan 3:18]
Al-Mu’min is the one Who accepts His believing slaves, i.e., He accepts their faith and sincerity and makes them steadfast. And He fulfils His promise to His slave of reward.
He gives security to His close friends (awliya’) by keeping them safe from His punishment and torment. So they are safe, and no one is safe except those to whom He grants safety. He fulfils what His slaves think of Him and never allows their hopes to be dashed.
He is the one Who declared Himself to be One, as He says (interpretation of the meaning):
“And your Ilaah (God) is One Ilaah (God — Allaah)” [al-Baqarah 2:163]
He is the One Who guarantees not to treat His creation unjustly, and the one who does not deserve His punishment is safe from it.
He is the One Who will accept the testimony of His Muslim slaves on the Day of Resurrection, when the nations will be asked whether the Messengers conveyed the Message. Allaah says (interpretation of the meaning):
“ [the Prophet (peace and blessings of Allaah be upon him)] has faith in the believers” [al-Tawbah 9:61]
All of these attributes belong to Allaah because He spoke the truth of Tawheed to which He calls His slaves. He guarantees that His slaves will not be treated unjustly [in the Hereafter] and promises Paradise to those who believe in Him and Hell to those who disbelieve in Him. And He is the One Who keeps His promise.