Hebrews 11:38

11:38 (the world was not worthy of them); they wandered in deserts and mountains and caves and openings in the earth.

Hebrews 13:2

13:2 Do not neglect hospitality, because through it some have entertained angels without knowing it. ¹ 

[13:2]  ¹ sn This is a vague allusion to people described in scripture and extra-biblical literature and may include Abraham and Sarah (Gen 18:2-15), Lot (Gen 19:1-14), Gideon (Judg 6:11-18), Manoah (Judg 13:3-22), and possibly Tobit (Tob 12:1-20).