Which of the two sayings is more correct: "May Allah grant you a good morning" or "May Allah grant you a good evening," or "Allah be with goodness"? And why?

"May Allah grant you a good morning" or "good evening" is a phrase that is correct in both meaning and structure, as is its shortened form, "May Allah grant you good." The greeting of Islam is "peace" (As-salam), and it should not be replaced by anything else, due to the Prophet's saying: "Whoever begins with speech before peace, do not answer him." Some scholars hold the view that there is no harm in initiating with a supplication, such as "May Allah grant you a good morning," "good evening," or "May Allah bless you." Sheikh Ibn Uthaymeen, however, is of the opinion that the prescribed greeting of peace is "Peace be upon you" (As-salamu alayka) or "Peace upon you" (Salamun alayka), and phrases similar to "May Allah grant you a good evening" should be said after the prescribed greeting of peace. Replacing the prescribed greeting with them is an error.