What it does
Yerach Ben Yomo, also called Galgal, is the rarest conjunctive in the Torah. It appears only once, leading into Karne Parah in Bamidbar 35:5, the same verse that contains the only Karne Parah. The two rare marks travel together.
Where it appears
Once. Bamidbar 35:5. Anywhere else in the Tanakh it might appear, but in the Torah this is its sole moment.
How to remember it
The name means "day-old moon." The mark itself is a small curved crescent above the letter, evoking the thin sliver of a new moon. Galgal, an alternate name, means "wheel" or "circle."
Example from the Torah
Bamidbar 35:5
Yerach Ben Yomo and Karne Parah appear together exactly once: in the verse describing the boundary measurements of the Levite cities.
Hear the melody
A synthesized rendering of the melodic shape, not a vocal recording. For a baal koreh's voice on a full aliyah, PocketTorah is a great free resource.
Hand signal (simanim)
Often confused with
These two rare marks travel together. Yerach Ben Yomo is the conjunctive servant; Karne Parah is the disjunctive it leads into. Both appear only in Bamidbar 35:5.