SEV Biblia, Chapter 38:9
Y sabiendo Onán que la simiente no había de ser suya, sucedía que cuando entraba a la mujer de su hermano corrompía en tierra, por no dar simiente a su hermano.
Clarke's Bible Commentary - Genesis 38:9
Verse 9. Onan knew that the seed should not be his] That is, that the child begotten of his brother's widow should be reckoned as the child of his deceased brother, and his name, though the real father of it, should not appear in the genealogical tables.
Matthew Henry Commentary
The profligate conduct of Judah and his family. --This chapter gives an account of Judah and his family, and such a account it is, that it seems a wonder that of all Jacob's sons, ou Lord should spring out of Judah, Heb 7:14. But God will show that his choice is of grace and not of merit, and that Christ came into the world to save sinners, even the chief. Also, that the worthiness of Christ is of himself, and not from his ancestors. How little reason ha the Jews, who were so called from this Judah, to boast as they did, Jo 8:41. What awful examples the Lord proclaims in his punishments, of his utter displeasure at sin! Let us seek grace from God to avoid ever appearance of sin. And let that state of humbleness to which Jesu submitted, when he came to put away sin by the sacrifice of himself, in appointing such characters as those here recorded, to be his ancestors endear the Redeemer to our hearts __________________________________________________________________
Original Hebrew
וידע 3045 אונן 209 כי 3588 לא 3808 לו יהיה 1961 הזרע 2233 והיה 1961 אם 518 בא 935 אל 413 אשׁת 802 אחיו 251 ושׁחת 7843 ארצה 776 לבלתי 1115 נתן 5414 זרע 2233 לאחיו׃ 251