וידבר אלקים אל משה ויאמר אליו אני ד'
The context of the word dabeir, speak, connotes a stronger, harsher form of speech. Rashi explains that the Torah is implying that Hashem rebuked Moshe Rabbeinu for his previous complaint: Lamah Ha’reiosa la’am hazeh, “(My Lord) why have You done evil to this people?” (Shemos 5:22): This implies that the lack of success of Moshe’s mission to Pharaoh was attributable to Hashem’s lack of support of his efforts. Veritably, Moshe was not blaming Hashem; he wondered why Hashem permitted Pharaoh to do such evil to His People. Pharaoh was a despot. Why did Hashem grant him license to inflict pain…