أحسن الله إليكم Shaykh Rayyis mentioned in his expl. Of thalathatul usool, that ayah 1 surah Fatiha (in asl 1) is the dalīl that Allah is the only one deserving of worship instead of the lord of all that exists Can you explain it?, barakaAllahu fīkum

Ustadh AbdulAziz al-Haqqan

Well since He is the Lord of all living things then it is commom sense and followes naturally that He is The One worthy of worship.