1 Kings 18:41

Get thee up, eat and drink - Ahab had descended the hill-side with Elijah, and witnessed the slaughter of the priests. Elijah now bade him ascend the hill again, and partake of the feast which was already prepared, and which always followed upon a sacrifice.

There is a sound of abundance of rain - Either the wind, which in the East usually heralds rain, had begun to rise, and sighed through the forests of Carmel - or perhaps the sound was simply in the prophet’s ears, a mysterious intimation to him that the drought was to end, and rain to come that day.