La Genèse 49:30 Midrash : Midrash Tanchuma Buber

(Gen. 23:15:) MY LORD, LISTEN TO ME. WHAT IS A PIECE OF LAND WORTH FOUR HUNDRED SHEKELS OF SILVER BETWEEN YOU AND ME? He said to him: If you want to give me four hundred centenarii of silver from the goods {another reading is hervata, which is construed as "dung" in the 'Arukh}¹¹This bracketed note appears in this form in the Buber text. of your house, you can give it to me. Because he brought in an evil eye (i.e., of greed) for Abraham's wealth, <his name> is lacking the letter waw, where it is stated (in Gen. 23:16): <SO ABRAHAM HEEDED EPHRON,> AND ABRAHAM WEIGHED OUT THE SILVER FOR EPHRON. It is the second EPHRON that is deficient.¹²An English equivalent might be the spelling, EPHRN, although Hebrew would add the second vowel, whether represented by a letter or not. The defective spelling also occurs in Gen. 25:9; 49:30; 50:13.