- Question: Why can you fulfill the mitzvah of pidyon haben by giving the five coins one coin at a time to the kohen but you can’t fulfill the mitzvah of lulav and esrog by picking up each of the four species one at a time?
A. Rav Algazi In Bechoros daf 51 says based on a Tosfos in Sukkah 34b which talks about picking up the lulav and esrog to do the mitzvah that Tosfos holds that anything which is one mitzvah cannot be done one after the other even if you had in mind originally to pick up each item one at a time.
B. The main mitzvah that pidyon haben dependent on giving money (to the kohen).
C. The main mitzvah of lulav and esrog is taking them.
Answer: By lulav and esrog all 4 species must be taken if each one was picked up separately you can’t say they add up to taking all of them a daled minim. But as long as the kohen gets his money in the end it doesn’t matter how that happens the mitzvah is fulfilled so you can give each coin one at a time.