Assalamualaikum. According to Prof Dr Abdul Malik Karim Amarullah, Hamka;  If you want to see Muslims, come to the mosque on Eid and Hajj prayer. But if you want to see a true believer in Islam, come to the mosque at dawn (Fajr prayer). That is different between them. Indeed, that Fajr prayer is the reflection of himself.  How?  1-If the Fajr prayer is always maintained. That's a sign of safety from hell. (Jika Subuhnya senantiasa dipelihara. Itu tanda akan Selamat dari neraka). 2- If Fajr prayer is not there no missed. God protect him from all illusions.  (Jika Subuhnya tiada dia tinggal. Allah melindunginya dari segala aral). 3-If the Fajr prayer is preceded by Sunnah prayer. Surely he got the whole world and its content. (Jika Subuhnya didahului dengan Sunat. Pasti seluruh dunia beserta isinya, dia dapatkan).  4-If the Fajr prayer is in dark towards to mosque. In the darkness of the hereafter he finds the light. (Jika Subuhnya bergelap-gelap menuju Musholla. Di kegelapan akhi