Rashi on Genesis 2:21/רש"י על בראשית ב׳:כ״א

1מצלעותיו OF HIS RIBS — The word means of his sides, similar to (Exodus 26:20) ולצלע המשכן “and for the second side of the tabernacle”; this has a bearing upon what they (the Sages) say, (Eruvin 18a): They were created with two faces (sides).

2ויסגור AND HE CLOSED UP the place where it was cut (Berakhot 61b).

3ויישן ויקח AND HE SLEPT AND then HE TOOK in order that he should not see the piece of flesh out of which she was created, for she might be despised by him (Sanhedrin 39a).