Reference for Menachot 53:29

שבע הזאות שבפרה מעכבות זו את זו חוקה

An objection was raised against him. It was taught: Of the four kinds used for the lulab two are fruit-bearing<span class="x" onmousemove="('comment',' The ethrog (the citron) and the lulab (the palm branch) .');">³⁴</span>

Jastrow

Jastrow