From about 45 minutes into Moby Dick (1998) en.wikipedia.org/wiki/Moby_Di...)
The actual line is "I've lowed for sperm whale from a leaking ship off Cape Horn."
This is a based on Chapter 49 of _Moby-Dick_, "The Hyena", which contains the text:
“Queequeg,” said I, when they had dragged me, the last man, to the deck, and I was still shaking myself in my jacket to fling off the water; “Queequeg, my fine friend, does this sort of thing often happen?” Without much emotion, though soaked through just like me, he gave me to understand that such things did often happen.
“Mr. Stubb,” said I, turning to that worthy, who, buttoned up in his oil-jacket, was now calmly smoking his pipe in the rain; “Mr. Stubb, I think I have heard you say that of all whalemen you ever met, our chief mate, Mr. Starbuck, is by far the most careful and prudent. I suppose then, that going plump on a flying whale with your sail set in a foggy squall is the height of a whaleman’s discretion?”
“Certain. I’ve lowered for whales from a leaking ship in a gale off Cape Horn.”
“Mr. Flask,” said I, turning to little King-Post, who was standing close by; “you are experienced in these things, and I am not. Will you tell me whether it is an unalterable law in this fishery, Mr. Flask, for an oarsman to break his own back pulling himself back-foremost into death’s jaws?”
“Can’t you twist that smaller?” said Flask. “Yes, that’s the law. I should like to see a boat’s crew backing water up to a whale face foremost. Ha, ha! the whale would give them squint for squint, mind that!”
in this production, the line is altered and given to Flask instead of Stubb.