Is it permissible for a person to say, "We have entered the morning, and unto Allah belongs the Kingdom this morning"?

The aforementioned wording is incorrect. The correct wording is what was narrated by Muslim and others: "We have entered upon morning, and the dominion has entered upon morning belonging to Allah, and all praise is due to Allah..." It is apparent that the الفاظ (wordings) by which one worships, such as the authentic adhkar (remembrances) and du'a (supplications), are not permissible to change or narrate by meaning.