Biblical Context:
Potiphar, an Egyptian officer of Pharaoh and captain of the guard, plays a significant role in the narrative of Joseph, found in the Book of Genesis. Joseph, sold into slavery by his brothers, is purchased by Potiphar and quickly rises to a position of trust within Potiphar's household due to the LORD's favor upon him. The account of Potiphar's reaction is primarily centered around the incident involving his wife and Joseph, which is detailed in Genesis 39.

The Incident:
Joseph, described as handsome and well-built, catches the eye of Potiphar's wife, who attempts to seduce him. Joseph, however, refuses her advances, citing his loyalty to Potiphar and his fear of sinning against God. Genesis 39:9 records Joseph's response: "How then could I do such a wicked thing and sin against God?" Despite his refusal, Potiphar's wife persists, and when Joseph continues to reject her, she falsely accuses him of attempting to assault her.

Potiphar's Reaction:
Upon hearing his wife's accusation, Potiphar's reaction is swift and severe. Genesis 39:19-20 states, "When his master heard the account his wife told him, saying, 'This is what your slave did to me,' he burned with anger. So Joseph’s master took him and put him into the prison where the king’s prisoners were confined." Potiphar's anger and subsequent actions reflect the gravity of the accusation in the cultural and legal context of ancient Egypt.

Analysis:
Potiphar's reaction can be understood through several lenses:

1. Cultural and Social Norms: In ancient Egyptian society, the accusation of a slave attempting to assault a master's wife would have been considered a grave offense, warranting severe punishment. Potiphar's decision to imprison Joseph, rather than execute him, may suggest a degree of doubt regarding his wife's account or a recognition of Joseph's character and previous loyalty.

2. Legal Implications: As captain of the guard, Potiphar held a position of authority and was responsible for maintaining order and justice. His reaction, therefore, aligns with his duty to uphold the law, even if it meant acting against a trusted servant.

3. Personal Conflict: Potiphar's anger, as described in the text, may also reflect a personal conflict between his trust in Joseph and his obligation to his wife. The narrative does not provide explicit details about Potiphar's internal deliberations, but his actions suggest a complex interplay of personal and societal pressures.

4. Divine Providence: From a theological perspective, Potiphar's reaction, while seemingly unjust, serves a greater divine purpose. Joseph's imprisonment becomes a pivotal moment in his journey, leading to his eventual rise to power in Egypt. This aligns with the broader biblical theme of God's sovereignty and ability to bring good out of human injustice.

Conclusion:
Potiphar's reaction to the accusation against Joseph is a critical turning point in the Genesis narrative. It highlights the complexities of human relationships, the influence of cultural norms, and the overarching theme of divine providence that permeates Joseph's account.