Exodus Exodus 5:1-23
Pharaoh answers the demand with a question — 'Who is YHWH that I should obey his voice? I do not know YHWH.' The whole plague cycle is the answer to that question, and this chapter ends not in rescue but in bricks without straw and a prophet's complaint.
Exodus Exodus 3:1-22
Moses asks two questions at the burning bush - 'Who am I?' and 'What is his name?' - and God answers both with one Hebrew word in two forms: ehyeh, the promise of presence that becomes the name above every name.