“In Judaism, showing hospitality (hakhnasat orchim) to guests is considered a mitzvah. When one knows of strangers who are hungry or need a place to relax, it becomes a legal obligation. Some rabbis consider hakhnasat orchim (literally the “bringing in of strangers”) to be a part of gemilut hasadim (giving of loving kindness).” – From The Jewish Virtual Library
The first story of hospitality in the Torah is when Abraham welcomes the strangers.
Ways to Deepen Your Congregation’s Welcome