Here is my translation of a relevant portion of Ben Sira.
"Regarding these three it can be said that they gave birth without having
had sexual relations. And these are the mother of Ben Sira, the mother of
Rav Zeira, and the mother of Rav Papah. And they were all wise men, great
in knowledge of Torah and in good deeds… And how did these mothers become
pregnant without having relations? Once they went into the bathhouse and
there was the seed of Jewish men in the water, and they did not know from
which man came the seed. But we know the identity of Ben Sira's father.
The prophet Jeremiah had a daughter. Once, Jeremiah went into the
bathhouse and found a group of evil men from the tribe of Ephraim who were
masturbating. Because the generation in the days of [King] Tzidkiyahu was
evil, and therefore it says, "In Tzidkiyahu was the evil deed." When they
saw that Jeremiah began to reprimand them they stood over him and struck
him. They said to him, "Why do you reprimand us? You shall not leave here
until you do as we have done." Jeremiah answered, "Please, let me go, and
I will swear to you that I will never tell anyone of this." They replied,
"And did not Tzidkiyahu, who saw Nebuchadnezzar eating a live rabbit also
swear that he would never tell, only to get that oath annuled? And you
will do likewise [and get the oath annulled]! And now, if you do as we
have done, all will be well. If not, we will sodomize you." Immediately
Jeremiah did it and began to curse the day he was born… and he accepted
upon himself a fast, and ritually immersed himself and emerged pure.
But the seed lasted and did not rot, until his daughter entered the
bathhouse and it entered her womb and impregnated her. Seven months later
she bore a son. And this son exited [her womb] with the ability to speak,
and his mother was embarrassed from all creatures, that they should not
say "the daughter of Jeremiah bore a son from illicit relations."
He said, "Mother, do not be embarrassed. I am the son of Sira." His mother
asked, "Who is Sira?" He replied, "My father. [Alternatively, your
father.] He (Jeremiah) is called Sira because he is the officer on all the
officers and the king, and numerologically, Jeremiah is equivalent to
Sira." She asked, "My son, if so, you should have said 'Son of
Jeremiah'..."