Isaiah 16:12
11 So my heart constantly sighs for Moab, like the strumming of a harp, my inner being sighs for Kir Hareseth. 12 When the Moabites plead with all their might at their high places and enter their temples to pray, their prayers will be ineffective. 13 This is the message the Lord previously announced about Moab.
LXX Isaiah 16:12
11 Therefore my belly will resound like a lyre upon Moab, and my inward parts will be like a wall that you have made new. 12 And it will be for your shame, because Moab has become weary at the altars, and she will enter the works of her hands in order to pray but will not be able to deliver him. 13 This was the word that the Lord spoke against Moab at the time he also spoke.
Notes and References
"... Baer thinks he can detect in the Greek Isaiah the translator’s inclination towards downgrading idolatrous practices and avoiding mythological language. In his monograph Baer offers several illustrations of this kind, but here I shall just very briefly mention the ones that entail a plus or a minus ... Isaiah 16:12: in contrast to the Masoretic text, which speaks of Moab who cannot pray, in the Septuagint it is idols made by the hand of man that are “not able to save.” In this way the translator has seized on the possibility of ridiculing the Moabite cult ..."
Vorm-Croughs, Mirjam van der The Old Greek of Isaiah: An Analysis of its Pluses and Minuses (p. 468) Society of Biblical Literature, 2014