首楞嚴義疏注經 9.107

9.107

即從色究竟天捨厭成就，覺身為礙，銷礙入空者，既不能發明智慧，頓斷上惑成無學果，迴心向大，即以無漏聖道漸次厭捨，隨定感果，生此四天。受劫數報，方斷有頂地惑成阿羅漢，故名為鈍。言不迴心者，且約對前利根者說，非畢竟不迴，已如前說。

This refers to those who, from the Heaven of the Ultimate of Form, have accomplished renunciation and disgust, sense the body as an obstruction, and dissolve the obstruction to enter space. Since they cannot bring forth wisdom,頓sever the upper defilements, realize the fruit of non-learning, and turn their minds toward the Great [Vehicle], they instead use the uncontaminated noble path to gradually renounce and cast off, inducing their fruits according to their samādhis and being born in these four heavens. After enduring the retribution of kalpa-durations, they only then sever the defilements of the Summit of Existence and become arhats; hence they are called 'dull'. Saying that they 'do not turn their minds' is spoken provisionally in contrast to the sharp-rooted ones mentioned before; it does not mean that they will never turn their minds at all, as has already been explained above.