/vahi / वहि

/vahi "we two (sleep)" is the dual ending in group /iDvahimahiG

**alabha- अलभॱ + /vahi → !**alabhAvahi अलभावहि "We two got" with atodIrghoyaJi

It becomes /vahe''' in the /laT —

labh- लभ् + /vahi → labh- लभ् + /vahe''' → !**labhAvahe लभावहे "we two get"

/zIG + /vahi → zI- शीॱ + /vahe''' → ze- शेॱ + /vahe''' → !**zevahe शेवहे "we two sleep"

**paca- पचॱ + /laT /vahi → !**pacAvahe पचावहे "we two cook our food"

**nIya- नीयॱ + /vahi → !**nIyAvahe नीयावहे "we two are led"

with lengthening by atodIrghoyaJi.

Where's the e ए come from?