Rapheh ֿ is above the letters, and upon it is stated: (Ez. 1:22) And the image upon the heads of the ḥayah, was of a firmament, like the hue of the awesome ice, extended over their heads from above.

‘Extended’ – this is rapheh,... extended over the heads of the ḥayot, which are [YQV”Q – 4] letters, surely.

Dagesh ּ is inside the letters, like this: יּקּוּקּ, Rapheh ֿ is outside, like this: יֿקֿוֿקֿ, and they are like ‘a bridle (meteg) and curb’ for the letters, and of them: (Ez. 1:14) And the ḥayot were running and returning... running – with dagesh, and returning – with rapheh.