In Genesis's account of Noah's Ark, Noah took seven pairs of every clean animal. Genesis 7:2 instructs him to take seven pairs, male and female, of clean animals, while taking one pair of animals that were not clean.
The wording is often translated as “seven pairs” or “seven of each kind,” which has produced discussion about whether the Hebrew means seven individuals or seven male-female pairs. Many English translations explicitly render the phrase as seven pairs, matching the conventional trivia answer.
Genesis 8:20 provides a reason for the larger number: after leaving the ark, Noah built an altar and offered burnt offerings from every clean animal and bird. If only one pair of a clean species had been preserved, such an offering would raise an obvious population question within the story's logic.
This instruction also differs from Genesis 6:19-20, which describes bringing animals in general. Reading both passages together explains why summaries may mention one pair broadly but seven pairs for clean animals specifically.