וַיֹּ֤אמֶר אֵלִיָּ֙הוּ֙ לְאַחְאָ֔ב עֲלֵ֖ה אֱכֹ֣ל וּשְׁתֵ֑ה כִּי־ק֖וֹל הֲמ֥וֹן הַגָּֽשֶׁם׃
And Elijah said unto Ahab: ‘Get thee up, eat and drink; for there is the sound of abundance of rain.’
Read halakhic rulings (Jewish law) on I Kings 18:41: and classical halakhic sources.