שאלו את בן זומא בתולה שעיברה מהו לכ"ג מי חיישינן לדשמואל דאמר שמואל
יכול אני לבעול כמה בעילות בלא דם או דלמא דשמואל לא שכיחא אמר להו דשמואל לא שכיח וחיישינן שמא באמבטי עיברה והאמר שמואל כל שכבת זרע שאינו יורה כחץ אינו מזרעת מעיקרא נמי יורה כחץ הוה
This is an interesting gemara, and not just because it speaks of virgin birth and a sort of immaculate conception. If I am not mistaken, Ben Zoma was a Tanna of the first third of the second century, while Shmuel was born in 165 CE (about the last third of the second century) in Bavel. I don't know that they would have even met, or that they would have asked Ben Zoma a question based on a claim of Shmuel. It seems likely, then, that the statement of Shmuel was brought in to clarify. But if so, this would be stammaitic, and the initial gemara would be left with just the question and Ben Zoma saying that the case is not shchiach. And the implication clearly would be about intercourse without breaking the hymen, which the gemara helpfully supplies. And if so, the case of the ambatya would also likely be from the setama digemara. It would seem to be so anyway on stylistic grounds."They asked Ben Zoma: A virgin who became pregnant, what is the law regarding her marrying a high priest? Do we consider that that Shmuel said, for Shmuel said, 'I am able to have many intercourses without blood'; or perhaps, that of Shmuel is uncommon? He said to them: It is not common. And we are concerned that she became pregnant in a bathtub. But Shmuel said: Any semen which does not shoot out like an arrow cannot make pregnant. Initially, it did shoot out like an arrow."
All this as a lead-in to another planned post about the status of the midrashic, or else "midrashic" work, The Alphabet of Ben Sirah.