Genesis 24:2

24:2 Abraham said to his servant, the senior one ¹  in his household who was in charge of everything he had, “Put your hand under my thigh ² 

Genesis 43:16

43:16 When Joseph saw Benjamin with them, he said to the servant who was over his household, “Bring the men to the house. Slaughter an animal and prepare it, for the men will eat with me at noon.”

Genesis 43:19

43:19 So they approached the man who was in charge of Joseph’s household and spoke to him at the entrance to the house.

¹ tn The Hebrew term זָקֵן (zaqen) may refer to the servant who is oldest in age or senior in authority (or both).

² sn Put your hand under my thigh. The taking of this oath had to do with the sanctity of the family and the continuation of the family line. See D. R. Freedman, “Put Your Hand Under My Thigh – the Patriarchal Oath,” BAR 2 (1976): 2-4, 42.