Following are a number of back-translations of Matthew 13:15:

• Uma: “Because their hearts are hard, they make themselves deaf and they make themselves blind: they refuse to see with their eyes, they refuse to hear with their ears, they refuse to have their hearts made clear. That’s why they will not return to Me, and I will not give them goodness/salvation.’ ‘” (Source: Uma Back Translation)
• Yakan: “Because the liver of these people has become hard. They stop their ears and shut their eyes. If they would not do like that, they would see with their eyes, they would hear with their ears, they would understand in their livers and they would return to me, says God, and I would forgive their sins.'” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “For as these people, their thinking has become hard. They have stopped up their ears. They have closed their eyes. Because if they didn’t they would be able to see and they would be able to hear, and they would understand what is right, and they would trust in me and I would set them free.’ ‘” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “Because their minds/thoughts have already hardened. They turn-a-deaf-ear-to the truth while they also close-their -eyes lest they be-able-to-see, able-to-hear, and able-to-understand and-then turn-to-face me so that I will heal them.’ ‘” (Source: Kankanaey Back Translation)
• Tagbanwa: “Really, as for these people, they have become stubborn (lit. made their heads hard). They’re making- their -ears-let-things-go-in-one-side- -and-out-of-the-other and they’re closing their eyes. For if it wasn’t like that, maybe they would indeed be able to see, and be able to hear, and be able to understand, and they would indeed return to me that I would heal them, whereas they won’t.'” (Source: Tagbanwa Back Translation)
• Tenango Otomi: “Because these people have closed their minds. It is as though they stopped their ears, not wanting to see what there is to see. Because they do not want to understand about the word and they do not want to turn their hearts to believe in me that they would have their sins forgiven,’ says God.” (Source: Tenango Otomi Back Translation)

For the Old Testament quote, see Isaiah 6:9 and Isaiah 6:10.