清心了意 Heart Cleared And Mind Settled
此時三藏解燥除煩，清心了意。四眾皈依，謝了金剛，各轉寶山。六丁六甲升空保護。此时三藏解燥除烦，清心了意。四众皈依，谢了金刚，各转宝山。六丁六甲升空保护。
逐句解 Line by line
At this Tripitaka was rid of his parching and his vexation, his heart cleared and his mind settled.
清心了意 takes 了 at liǎo, the verb — to settle or bring to completion — and not the light le the character carries almost everywhere else. It is the second such site in the chapter after 說不了, and nothing marks either. 解 is jiě. The phrase belongs to the vocabulary of religious practice rather than of comfort: what is relieved is not only the heat.
The four took refuge, thanked the Vajras, and each returned to his own precious mountain.
皈依 is to take refuge in the Three Jewels, the formal act of Buddhist commitment, and 四眾 counts the master and three disciples. 各轉寶山 sends the Vajras home to the four mountains the previous passages named one by one.
The Six Ding and Six Jia rose into the sky to keep guard.
The dispersal is reported company by company, each with its own sentence.
解燥除煩 undoes the two complaints that started the whole errand. Tripitaka was sent his disciples because 一則火氣蒸人，二來心焦口渴 — steamed by the fire-vapour, his heart scorched and his mouth dry — and the chapter closes his discomfort in the same four-and-four shape it opened it.
清心了意 does more than that, though. 了 here is the verb, to settle or bring to completion, and the phrase belongs to the vocabulary of practice rather than of comfort. What is relieved is not only the heat.
Then the host disperses, company by company, each with its own sentence. The Vajras to their four mountains, the Six Dīng and Six Jiǎ into the sky, and the chapter begins putting away the machinery it spent five passages assembling.