〈人／ひと／ヒト〉を〈呪／のろ〉わば〈穴／墓／あな／アナ〉〈二／ふた〉つ

Google N-gram Corpus Counts
╭─ーーーーーーーーーーーー─┬────────┬───────╮
│ 人を呪わば穴二つ　　　　 │ 10,307 │ 89.1% │
│ 人を呪わば穴ふたつ　　　 │  1,026 │  8.9% │ - add, sK
│ 人をのろわば穴二つ　　　 │     70 │  0.6% │
│ ヒトを呪わば穴二つ　　　 │     36 │  0.3% │
│ ひとを呪わば穴二つ　　　 │     29 │  0.3% │
│ 人を呪わばアナ二つ　　　 │     28 │  0.2% │
│ ひとを呪わば穴ふたつ　　 │     22 │  0.2% │
│ ひとをのろわばあなふたつ │     47 │  0.4% │
╰─ーーーーーーーーーーーー─┴────────┴───────╯

@@ -5,0 +6,4 @@
+</k_ele>
+<k_ele>
+<keb>人を呪わば穴ふたつ</keb>
+<ke_inf>&sK;</ke_inf>

* wisdom: Curses come home to roost.
* luminous: He that hurts another hurts himself.
* saito: “Curses come home to roost”―“A curse cuts both ways”―“Harm watch, harm catch.”

* https://en.wiktionary.org/wiki/curses,_like_chickens,_come_home_to_roost

人を呪わば穴二つ 10,307
人を呪わば墓二つ      0 <- 明鏡ことわざ成句使い方辞典: [誤用]

I think the original was fine and idiomatic in English. Saw it translated in a show's subtitles as "An arrow shot upright falls on the shooter's head."

See also: https://quoteinvestigator.com/2019/07/07/two-graves/

@@ -5,0 +6,4 @@
+</k_ele>
+<k_ele>
+<keb>人を呪わば墓二つ</keb>
+<ke_inf>&sK;</ke_inf>
@@ -13 +17,2 @@
-<gloss>if you curse someone, dig two graves</gloss>
+<gloss>curses come home to roost</gloss>
+<gloss g_type="lit">if you curse someone, dig two graves</gloss>

https://www.thedailybeast.com/yamaguchi-gumi-kobe-yamaguchi-gumi-civil-war-has-wrecked-the-supremacy-of-the-yakuza
There is a Japanese saying, “If you curse someone, dig two graves.”

More literal, less clumsy than previous glosses.

@@ -13,2 +13 @@
-<gloss>a curse will rebound on yourself as well</gloss>
-<gloss>curses, like chickens, come home to roost</gloss>
+<gloss>if you curse someone, dig two graves</gloss>