Nachman of Breslov,
Translation:Likutei Moharan — 151…
“ For WAW is the vitality of every thing (v. Zohar Ber. 256) , therefore lacking the WAW alludes to lacking its vitality as mentioned, so that's from were is drawn death to small children, God forbid. But on Rosh Chodesh the moon starts to fill up and be repaired as is known, for then the ultimate blemish and lacking has been reached, so then immediately starts the repair and filling. ”
