同證西方 The Lament To Xuanzang
道：「師父啊！當年皈正，蒙觀音菩薩勸善，脫離天災。我與你苦歷諸山，收殄多怪，降八戒，得沙僧，千辛萬苦，指望同證西方，共成正果。道：「师父啊！当年皈正，蒙观音菩萨劝善，脱离天灾。我与你苦历诸山，收殄多怪，降八戒，得沙僧，千辛万苦，指望同证西方，共成正果。
逐句解 Line by line
He said, "Master! Ah, Master —
The speech has no attribution beyond the bare verb, because the verse before it has already told us who is speaking and in what state.
"In that year I came back to the right road, and by the grace of the Bodhisattva Guanyin, who urged me to good, I escaped the calamity of heaven.
皈正 is the technical term for taking refuge and turning to the correct path, and 天災, the heavenly calamity, is the five hundred years under the mountain. He is starting his account of himself from the beginning, which is what people do when they think they are at the end of it.
"You and I have toiled over every mountain, put down a great many monsters, subdued Bajie and gained Sha Monk, through a thousand hardships and ten thousand pains, hoping to attain the West together and complete the true fruit as one."
降 is xiáng, to subdue — not the jiàng of coming down. 千辛萬苦 is still everyday Chinese for going through the mill. 正果, the true fruit, is the Buddhist term for the end of the road: the result that ripens when the practice is finished.
This is a curriculum vitae delivered to nobody. Wukong is alone inside a sealed bottle several kilometres inside a mountain, and he is reciting the whole pilgrimage from the day he was let out from under the rock. Nothing in the scene requires it. Everything in his character does.
The verbs are worth reading as a list: subdued Bajie, gained Sha Monk. He counts the party as things he acquired, which is the monkey talking — and then the sentence ends on 同 and 共, together and as one, which is the pilgrim talking. Both are in there.