Their tawhid (the oneness of Allah) is of two types: verbal and practical, and each type has proof (explaining the types of the tawhid of the prophets and messengers in speech and action)

The Shaykh : He said: “Their tawhid (the oneness of Allah) is of two types: verbal and practical, and each type has proof”
Tawhid (the oneness of Allah) is of two types: verbal and practical. The verbal type is through the tongue and the heart, and the practical type is through the limbs and the heart. The verbal type is through the tongue and the heart, and the practical type is through the heart and the limbs.
So tawhid (the oneness of Allah) with the heart is for the one to say, for example: “La ilaha illa Allah” (There is no deity but Allah). This is tawhid in speech and in the heart, where one affirms that Allah alone is the deity. Tawhid in action is that one does not associate anyone with Allah in his actions, so he does not prostrate to an idol or to any of the created beings. Tawhid with the heart, the practical tawhid with the heart, is reliance upon Allah and depending on Him, and the like of that. All of this will be explained in the words of the author.