Tafsir of Al-Mulk 67:29

قل هو الرحمن آمنا به وعليه توكلنا

Say: "He is the Most Gracious, in Him we believe, and upon Him we rely. meaning, `we believe in the Lord of all that exists, the Most Gracious, the Most Merciful, and upon Him we rely in all of our affairs.' This is as Allah says,

فاعبده وتوكل عليه

So worship Him and rely upon Him. (11:123) Thus, Allah continues saying,

فستعلمون من هو في ضﻼل مبين

So, you will come to know who it is that is in manifest error. meaning, `between Us and you, and to whom the final end (ultimate victory) will be for in this life and in the Hereafter.' Reminding of Allah's Blessing by the springing of Water and the Threat of It being taken away Demonstrating how merciful He is to His creatures, Allah says;