Terumos 4:3 - 4:4

עין יפה אחד מארבעים – He who is prompted by the heart and donates the heave-offering generously, separates one in forty.

והבינונית אחד בחמשים – these are not the words of the School of Shammai, but rather, the first Tanna, who stated it. But from the generosity of the School of Shammai (who said one in thirty) you learn for their words what is selfishness/the evil eye and the middle/intermediate amount, even though they are not taught [explicitly] in our Mishnah.

ועלה בידו אחד מששים – as, for example, that he donated from an estimate/guess-work, and there came up into his hand one out of sixty which is selfishness/the evil eye.

חזר והוסיף חייב במעשרות – for he has already exempted and the designation of heave-offering does not fall upon what he adds, therefore, this addition is completely eatables forbidden pending the separation of sacred gifts , and he is liable for tithes.

מששים ואחד – as, for example, that there were sixty one Seah in the pile and he took up a Seah in his hand, that Seah is the heave-offering/Terumah.

ויחזור ויתרום כמו שהוא למוד – [if he was accustomed] to donate one from sixty, he should still separate one from sixty in a Seah, and if he was accustomed to donate one from fifty [Seah], and there were found that there still remained eleven Seah that had not been donated [for Terumah].

במדה ובמשקל – meaning to say, that excess/surplus that he donates [as Terumah], it is permissible to donate/separate out Terumah by measure, or by weight or by number. For they didn’t say to donate/separate Terumah] from an estimate, other than at the beginning of the heave-offerinf.

אף שלא מן המוקף – for Rabbi Yehuda holds that one does not need to donate [Terumah] from that which is near and adjoining, other than at the beginning of Terumah. But the Halakha is not according to Rabbi Yehuda.

מוקף – near and adjoing, and in the same place iself.

כדעתו של בעל הבית – because [he is one] who donates generously, and there are those who are miserly/with an evil eye, and there are those who donate the intermediate amount.

פיחת עשרה – and he donated one in forty.

או הוסיף עשרה – and donated [Terumah] from [one in] sixty.

תרומתו תרומה – for since that in one of he measures of he Sages he donated [Terumah], he can say to him: “For this I have estimated for you.”

ואם נתכוין להוסיף – that he knows the intention of the owner of the house, and he intended to add, even one, his heave-offering is not a heave-offering.