Ruth 2:8 records Boaz's invitation to Ruth to stay in his field, the first kindness that leads to Naomi's plan.

Ruth 2:20-23 identifies Boaz as a kinsman-redeemer and shows Ruth's continued gleaning, providing background for Naomi's plan.

Ruth 2:23 notes the end of harvest, explaining why Boaz is now winnowing barley — the timing for Naomi's plan.

Ruth 2:1 first introduces Boaz as a relative of Naomi's husband, establishing the family connection Naomi now acts on.

Leviticus 25:25 defines the kinsman-redeemer's duty to redeem land, which Boaz later fulfills — relevant to his identity.

Deuteronomy 25:5 gives the levirate marriage law for a brother, which underlies the kinsman-redeemer custom Boaz may fulfill.

Deuteronomy 25:6 specifies preserving the dead brother's name, a key concern in Ruth's story with Boaz.