Romans 12:13 - Coke's Commentary on the Holy Bible

Given to hospitality— It was the more proper for the Apostles frequently to enforce this duty, as the want of public inns rendered it difficult for strangers to get accommodations; and as many Christians might be banished their native country for religion, and perhaps laid under a kind of excommunication, both among Jews and heathens; which would make it a high crime for any of their brethren to receive them into their houses. See Blackwall's Sacred Classics, vol. 1: p. 232.