Shulchan Arukh, Yoreh De'ah 346

<b>מי שקרובו צלוב בעיר לא ידור בה. ובו סעיף אחד:</b><br>מי שהיה בעלה עמה צלוב בעיר או שאשתו עמו צלובה בעיר או אביו ואמו ועדיין לא כלה הבשר כולו לא ישהה בתוכה אא"כ היתה גדולה כאנטוכיא שאין אלו מכירין את אלו ולא ישהה בצד זה אלא בצד זה:

One whose husband [who was] with her, was impaled in the [same] city [wherein she dwells], or his wife [who was] with him, was impaled in the [same] city [wherein he dwells], or [if such is the case with] one's father or mother, and the flesh [of the corpse] had not yet entirely wasted away, — [the law is that the near-of-kin] should not dwell therein, But if the flesh became entirely decomposed, or if the corpse was interred, this ruling does not apply — Perisha. The law stated here applies only if the impaled person is within city limits — BaḤ. unless it was as large as Antioch,). where some [people] do not know others; and one should not dwell on this side, but [rather] on the other side. VI, 11; Asheri and RaN to M.K. 27b.