כִּ֣י רַק־ע֞וֹג מֶ֣לֶךְ הַבָּשָׁ֗ן נִשְׁאַר֮ מִיֶּ֣תֶר הָרְפָאִים֒ הִנֵּ֤ה עַרְשׂוֹ֙ עֶ֣רֶשׂ בַּרְזֶ֔ל הֲלֹ֣ה הִ֔וא בְּרַבַּ֖ת בְּנֵ֣י עַמּ֑וֹן תֵּ֧שַׁע אַמּ֣וֹת אָרְכָּ֗הּ וְאַרְבַּ֥ע אַמּ֛וֹת רָחְבָּ֖הּ בְּאַמַּת־אִֽישׁ׃
(르바임 족속의 남은 자는 바산 왕 옥뿐이었으며 그의 침상은 철 침상이라 지금 오히려 암몬 족속의 랍바에 있지 아니하냐 그것을 사람의 보통 규빗으로 재면 그 장이 아홉 규빗이요 광이 네 규빗이니라)
Shulchan Arukh, Orach Chayim
7. Houses constructed in a settled and populated area, if they are located in a wilderness or rural region where wild animals are common, and a wild animal climbs onto the roof and takes a child from its crib (meaning a small bed made of iron), then it is considered sent. However, if it did not reach that specific crib, it is not considered sent. This applies to humans who endanger themselves by coming to a wildlife habitat. As for other types of crawling creatures on the land and flying creatures that were sent and caused harm, such as sending snakes and scorpions that cause harm but are not lethal, not to mention lice, mosquitoes, and the like, one does not fast or sound the alarm for them.