Reference for Bava Kamma 170:14
ואם תימצי לומר כיון דלא אמדוהו קא יהיב ליה דמי כוליה בהדי הדדי אמדוהו מהו מי אמרינן כיון דאמדוהו חדא חדא בעי למיתב ליה או דלמא כיון דלא שלים יהיב ליה דמי כוליה תיקו
Raba asked: If he had cut off [another man's] arm and before any appraisement had been made he also broke his leg, and again before any appraisement had been made he put out his eye, and again before any appraisement had been made he made him at last deaf, what would be the law? Shall we say that since no valuation has yet been made one valuation would be enough, so that he would have to pay him altogether for the value of the whole of him, or shall perhaps each occurrence be appraised by itself and paid for accordingly? The practical difference would be whether he would have to pay for Pain and Degradation of each occurrence separately. It is true that he would not have to pay for Depreciation, Healing and Loss of Time regarding each occurrence separately, the reason being that since he has to pay him for the whole of him the injured person is considered as if killed altogether, and there could surely be made no more payment than for the value of the whole of him; but in respect of Pain and Degradation the payment should be made for each occurrence separately, as he surely suffered pain and degradation on each occasion separately. If, however, you find it [more correct] to say that since no appraisement had been yet made he can pay him for the value of the whole of him altogether, what would be the law where separate appraisements were made? Shall we say that since separate valuations were made the payment should be for each occurrence by itself, or since the payment had not yet been made he has perhaps to pay him for the value of the whole of him? This must remain undecided.