The most succinct bible verse about welcoming others that springs to mind is Romans 15:7, in which the believers are told to welcome one another, as Christ has welcomed them. In Romans 12:13, followers are told here to contribute to others' needs and be welcoming, or show hospitality.
In this verse, Jesus invites followers to inherit the kingdom because they gave food to the hungry, drink to the thirsty and welcomed strangers. Peter 4:9 urges believers to show hospitality, or be welcoming, to one another cheerfully, without grumbling.
This verse urges readers to be welcoming to strangers, as one of them may be an angel in disguise. Leviticus 19:34 is a verse that speaks about treating strangers as friends and loving them as oneself, in other words making them feel welcome.
Here a list of qualities a believer should have are listed. They are: Loving what is good, being upright and holy, disciplined, self-controlled and, first of all, hospitable, or welcoming, while Acts 28:2 is devoted to praising natives who were particularly welcoming.
This again lists a range of qualities a person, in this case directed at an overseer, should display. It states that he should be above reproach, sober-minded, respectable, self-controlled, able to teach and hospitable, or welcoming.
This discusses what a woman should do to enter the kingdom of heaven. Being welcoming, or showing hospitality, is one of the things listed.
Here those who are welcoming to others are promised a reward, as is also the case in Matthew 10:40-42, where Jesus goes through a list of rewards in accordance to the people welcoming is extended to.