Acts 7:16

Which Abraham bought... of the sons of Hemor, the son of Sichem. This purchase made by Abraham must be different from the purchase of a field made afterwards by Jacob. (Genesis xxxiii. 19.) See a Lapide, the author of the Analysis, dissert. 23. P. Alleman, &c. (Witham) --- Abraham bought. There must be an error of the copyist in this verse. Either the word Abraham ought to be omitted, or changed into Jacob. For it is plain, from Genesis xxxiii. 19. that the latter bought the land from the sons of Hemor. The Hebrew says, he bought it for one hundred kesitha, which some translate pieces of silver; others, lambs. As for Abraham, and Jacob, they were buried in the cavern of Mambre, which Abraham had purchased from the children of Heth. (Genesis xxiii.) (Calmet) --- It is supposed that originally the name of Jacob was given, abridged JAB, and that the first letter having disappeared, the two remaining letters were taken by misprision, for the abridgment of the name of Abraham. Hemor was the father of Sichem, and here the Greek text simply calls him Hemor of Sichem. (Bible de Vence)