And when they told it to Jotham, he went and stood in the top of mount Gerizim, and lifted up his voice, and cried, and said unto them, Hearken unto me, ye men of Shechem, that God may hearken unto you. Stood in the top of Mount Gerizim - Gerizim and Ebal were mounts very near to each other; the former lying to the north, the latter to the south, and at the foot of them Shechem. But see some remarks on the extent of the human voice in some hilly countries in the following extract from a late traveler in the East: -
"The great extent to which the sound of the voice is conveyed may be mentioned. Some persons have thought this a proof of the extreme rarity of the atmosphere. A similar observation is made by Captain Parry in his Voyage of Discovery to the Polar Regions in 1819-20, where he states that in the depth of winter the sound of the men's voices was heard at a much greater distance than usual. This phenomenon is constantly observed on the Neilgherries. I have heard the natives, especially in the morning and evening, when the air was still, carry on conversation from one hill to another, and that apparently without any extraordinary effort. They do not shout in the manner that strangers think necessary in order to be heard at so great a distance, but utter every syllable as distinctly as if they were conversing face to face. When listening to them, I have often been reminded of those passages in holy writ where it is recorded that Jotham addressed the ungrateful men of Shechem from Mount Gerizim, that David cried 'from the top of a hill afar off' to Abner and to the people that lay about their master Saul, and that Abner addressed Joab from the top of a hill." - Letters on the Climate, Inhabitants, Productions, etc., etc., of the Neilgherries, or Blue Mountains of Coimbatoor, South India, by James Hough, of Madras: 1829.
That God may hearken unto you - It appears that Jotham received this message from God, and that he spoke on this occasion by Divine inspiration.