Responsa for Yevamot 227:6
אלא טעמא דדמאי הא ודאי בעא לעשורי והאמר ר' יוחנן בעושה על דעת אביו אלא רבי יוחנן ספוקי מספקא ליה קאי הכא מדחי קאי הכא מדחי
The reason, then,<span class="x" onmousemove="('comment',' Why the child is not prevented from the consumption of the fruit mentioned. ');"><sup>24</sup></span> is because [the fruit was] <i>demai</i>,<span class="x" onmousemove="('comment',' [H], land produce belonging to an 'am ha-arez (v. Glos.), since the prohibition of such produce is due to suspicion only. It is not certain that the prescribed dues were not given by the 'am ha-arez. ');"><sup>23</sup></span> but [had its prohibition been] certain<span class="x" onmousemove="('comment',' If, for instance, it had been definitely known that it had not been tithed. ');"><sup>25</sup></span> it would have been necessary to tithe it;<span class="x" onmousemove="('comment',' Before the child could be allowed to eat of it. ');"><sup>26</sup></span> but, surely [it may be objected] R. Johanan said<span class="x" onmousemove="('comment',' Supra, in explanation of the citation from Shab. 121a. ');"><sup>27</sup></span>
Teshuvot Maharam
SOURCES: L. 140.
Teshuvot Maharam
A. Lending charity-funds on condition that the lender share in the profits but not in the losses, is forbidden. The Rabbis who said (B. M. 70a) that a person lending money on such a condition is called "wicked" made no distinction between rich and poor. Since a poor person is not permitted to lend his money on condition that he share in the profits but not in the losses, we are not permitted to do so for him.
Teshuvot Maharam
A. Lending charity-funds on condition that the lender share in the profits but not in the losses, is forbidden. The Rabbis who said (B. M. 70a) that a person lending money on such a condition is called "wicked" made no distinction between rich and poor. Since a poor person is not permitted to lend his money on condition that he share in the profits but not in the losses, we are not permitted to do so for him.
Note: The following introduction precedes the answer: Please excuse me for the brief response. For the last two weeks I have been confined to bed and have lost the taste for food. I wrote to you a lengthy response regarding the lending of charity-funds, and sent it to you through a messenger named Marvel. I forgot the lengthy argument and discussion. I remember, however, to have agreed with your reasons and arguments, and to have added the following ….
SOURCES: L. 425; P. 476. Cf. Agudah B.M. 73.