Maaser Sheni 2:8 - 2:9

הפורט סלע ממעות מעשר שני – He who has copper coins of Second Tithe and comes to change the money into a silver Sela to bring up to Jerusalem because of the burden of the way.

ב"ש אומרים בכל הסלע מעות – if he comes to change them (i.e., the monies), he can change all of them and give them for the entire Sela.

וב"ה אומרים – he cannot change other than half of them, for the coins are spent in Jerusalem and when he comes there, for he will need coins immediately to buy the needs of the meal, and if everyone runs to the money-changer to change [monies], the coins will go up in value and will be found that the Second Tithe [monies] are lost. Therefore, they should carry coins with them to spend on a part [of his needs] and when they run out, he should change from the silver that is in his hand, little by little.

שקל – which is one-half of a Sela.

אין מחללין כסף ופירות על כסף – Whomever has one-half of a silver denar of [Second] Tithe and produce of {Second] Tithe worth one-half denar, he should not combine them together to redeem them on the denar.

וחכמים מתירין – for in that manner, via a combination of produce, since he only has one-half of a silver denar. But, to redeem a silver dinar and produce which are worth a dinar on half-a sela which is two denarim, the Sages agree that we don’t redeem them. And the Halakha is according to the Sages.

הפורט סלע של מעשר שני בירושלים – he would exchange the Sela that is in his hand and takes coins to spend them for the needs of the [Second] Tithe meal.

ב"ש אומרים – if he comes to exchange all the Selas that are in his hand for monies, he should exchange [them].

ובית הלל אומרים – he should not exchange other than half, lest he not stay in the city until he spends all of them. And he should deposit them in the city until another Festival, for the coins become moldy/decay, and he returns and exchanges them for Selas, it will be found that the money-changer earns double and the Second Tithe [monies] lose [value].

ודנין לפני חכמים – Shimon ben Azzai and Shimon ben Zoma and Hanan the Egyptian.

בשלשה דינרין כסף ובדינר מעות – The Sela is [worth] four denars, and when he comes to exchange the Selah, he will not receive anything other than one denar in coins and three denarim will be silver.

רביעית כסף ברביעית מעות – The fourth denar of silver, he shall not take other than one-quarter copper coins, and three-quarters silver, so that is found that he takes only one out of a sixteenth of a Sela. -

ארבעה אספרי כסף – A denar is equal to five Aspers, and this coin is [found] in Greece and until today, we call it Aspero. It is found that the Sela is worth 20 Aspers, and when he redeems the denar, he redeems it for four silver aspers and one of copper. It is found that he takes one copper out of twenty for a Seal alone.

יניחנה בחנות ויאכל כנגדה – he should redeem at all on the coins, let he forget and make them non-sacred. But he leaves the Sela with the store-keeper and consume its value until it is completely used up. But the Halakha is not according to any [of the opinions mentioned] but the School of Hillel alone.