Shemot 9:18-19

Hinei, tomorrow about this time I will cause it to rain very grievous barad (hail), such as hath not been in Mitzrayim since the foundation thereof even until now. Send therefore now, and gather thy mikneh, and all that thou hast in the sadeh; for upon every adam (man) and behemah (beast) which shall be found in the sadeh, and shall not be brought into shelter, the barad shall come down upon them, and they shall die.