Exodus 32:2-5 narrates Aaron making the golden calf — the very sin that provoked God's anger against Aaron in Deut 9:20.

Exodus 32:21 records Moses confronting Aaron about leading the people into sin — the immediate context of Moses' prayer for Aaron.

Exodus 32:35 reports God sending a plague because of the calf Aaron made — demonstrating the consequences of Aaron's sin that Moses prayed about.

Hebrews 7:26-28 presents Christ as a sinless high priest — contrasting Aaron, who sinned and needed Moses' intercession in Deut 9:20.

Exodus 32:25 explains that Aaron let the people break loose — the reason God was angry with him, as noted in Deut 9:20.

Psalm 99:8 recalls God's forgiveness and judgment toward Aaron, echoing His anger and Moses' intercession.

Numbers 11:2 shows Moses praying to stop fire — another instance of his intercession, paralleling his prayer for Aaron in Deut 9:20.

Numbers 21:7 shows Moses again interceding for a sinful people, mirroring his prayer for Aaron here.