Yevamos 56
In what ways are inferior relations effective for Levirate marriage? \u2022 Does Yibum require witnesses? \u2022 Why is Yevamos before Kesubos? \u2022 Would Jewish courts coerce a recalcitrant man to marry? \u2022 A woman's infidelity renders her prohibited to her husband \u2022 This prohibition of defilement requires the testimony of two witnesses to warrant administering lashes to the husband