Genesis Chapter 24, Verse 2

2: And Abraham said unto his eldest servant of his house, that ruled over all that he had, Put, I pray thee, thy hand under my thigh:- edit KJV text
2: And he said to the elder servant of his house, who was ruler over all he had: Put thy hand under my thigh,— edit Douay text
2: And Abraam said to his servant the elder of his house, who had rule over all his possessions, Put thy hand under my thigh,— edit LXX text