The Tur wrote concerning the words of the Rambam, and this is his wording: It appears from his words that a condition is only effective when there are no poor people. But this is not clear. Furthermore: why is a condition necessary when there are no poor people, for is there not no obligation upon him? Rather, because poor people are found at all times, and if so, it is obvious that he is not obligated until poor people happen upon him. Thus far his words. Behold, his second difficulty is not a difficulty at all, for we have already explained the opinion of the Rambam that separation is always required, just as with sacrifices. And this is why he was precise to say "he does not need to separate," and did not say "he does not need to give." But the Tur, because it was obvious to him that this applies only to sacrifices, therefore raised a difficulty against him. However, his first difficulty is certainly difficult. And this is what was difficult for the Tur: since the Rambam did not write the condition even when there are poor people, but rather wrote that he conditioned that he would not give until he finds a poor person, we learn from this that when there are poor people, a condition is not effective. And there is one who wrote that he took the common way of things, for it is not the way to make a condition when there are poor people (Beit Yosef). But it is forced to say so (Bach and Derishah). And there is one who wrote that in truth this is the opinion of the Rambam, that a condition is not effective when there are poor people, just as a condition is not effective regarding sacrifices after three festivals (Bach). And in my humble opinion, even regarding a sacrifice, why would a condition not be effective, if he vows to bring a sacrifice after a year or two? For behold, every vow is within a person's authority, according to his will to vow. And if he vows upon a condition, it is obvious that it is effective. And it appears more likely when we are precise with the words of the Rambam who wrote: "And if he conditioned that he would not give until he finds a poor person, he does not need to separate," thus far his words. For he opened with giving, and concluded with separation. Rather, he comes to teach us a novel point, for the fact that a condition is effective is not a novel point at all, as it is obvious that it is in his power to vow according to his will. Rather, the novel point is that he conditioned that he would not give until he finds a poor person, and one could say his intention was that he would not give to the gabbai until he finds a poor person (Derishah). And I would have said that in any case separation is required—he comes to teach us that in such a case he also does not need to separate (it appears to me). And there is one who says simply that when he conditioned that he would not give, we say that his intention was for separation, for since there is no poor person, to whom would he give? Rather, certainly he intended for separation (Taz, subsection 3). And it appears more likely as I have written, that even if he intended for giving, he does not need to separate. And afterwards he comes to teach us that a condition is effective even regarding the gabbaim, for I would have said that a condition is effective only regarding himself and not regarding the laws of the gabbaim. And he comes to teach us that even in this, a condition is effective.
והטור כתב על דברי הרמב"ם, וזה לשונו: יראה מדבריו שאין תנאי מועיל אלא כשאין עניים. ולא נהירא. ועוד: מה צריך תנאי כשאין עניים, והלא אין עליו חיוב? אלא משום שבכל שעה עניים מצויים, ואם כן פשיטא שאינו חייב עד שיזדמנו לו עניים. עד כאן לשונו. והנה קושיתו השניה לא קשיא כלל, דכבר בארנו דעת הרמב"ם דהפרשה צריך תמיד כמו בקרבנות. וזהו שדקדק לומר "אינו צריך להפריש", ולא קאמר "אינו צריך ליתן". והטור מפני דפשיטא ליה דזהו רק בקרבנות, לכן הקשה עליו. אמנם קושיתו הראשונה וודאי קשה. והכי קא קשיא ליה להטור: דמדלא כתב הרמב"ם התנאי אף בשיש עניים, אלא כתב שהתנה שלא יתן עד שימצא עני, שמע מינה דביש עניים לא מהני תנאי. ויש מי שכתב דאורחא דמילתא נקיט, שאין דרך להתנות כשיש עניים (בית יוסף). ודוחק לומר כן (ב"ח ודרישה). ויש מי שכתב שבאמת דעת הרמב"ם כן, דלא מהני תנאי כשיש עניים, כמו דלא מהני תנאי בקרבנות על אחר שלוש רגלים (ב"ח). ולעניות דעתי גם בקרבן למה לא מהני תנאי, כשידור להביא קרבן אחר שנה או שנתים? והרי כל נדר ברשותו של אדם הוא, כפי רצונו לנדור. ואם נודר על תנאי פשיטא דמהני. ויותר נראה כשנדקדק בדברי הרמב"ם שכתב: "ואם התנה שלא יתן עד שימצא עני אינו צריך להפריש", עד כאן לשונו. דפתח בנתינה, וסיים בהפרשה. אלא דרבותא קא משמע לן, דזה דמועיל תנאי אינו רבותא כלל, דפשיטא דבידו לנדור כפי רצונו. אלא דהרבותא היא דהוא התנה שלא יתן עד שימצא עני, ויש לומר כוונתו שלא יתן לגבאי עד שימצא עני (דרישה). והייתי אומר דעל כל פנים הפרשה בעי – קא משמע לן דבכהאי גוונא גם אינו צריך להפריש (נראה לי). ויש מי שאומר פשוט דכשהתנה שלא יתן, אמרינן דכוונתו להפרשה, דכיון דאין עני למי יתן? אלא וודאי שכיון להפרשה (ט"ז סעיף קטן ג). ויותר נראה כמו שכתבתי, דאפילו כיון לנתינה אינו צריך להפריש. ואחר כך קא משמע לן דמועיל תנאי גם לענין הגבאים, דהייתי אומר דתנאי מועיל רק לגבי עצמו ולא להדינים של הגבאים. וקא משמע לן דגם בזה מהני תנאי.