Reference for Menachot 106:15

סוף סוף כי קא כייל לעשרון קא כייל

as the olive-tree produces its best only at th very end,<span class="x" onmousemove="('comment',' It is only after many years that the olive-tree bears fruit.');">¹⁸</span> so Israel will flourish at the end of time.

Jastrow