Exodus 40:32 KJV

When they went into the tent of the congregation, and when they came near unto the altar, they washed; as the LORD commanded Moses.

Moses performs all as directedWhen the tabernacle and the furniture of it were prepared, they did not put off rearing it till they came to Canaan; but, in obedience to the will of God,...

Exodus 30:19–20 For Aaron and his sons shall wash their hands and their feet thereat: …
Exodus 40:19 And he spread abroad the tent over the tabernacle, and put the covering of the tent above upon it; as the LORD commanded Moses.
Psalms 73:19 How are they brought into desolation, as in a moment! they are utterly consumed with terrors.

From OpenBible.info, most relevant first.

Ablution Of priests
Israel The erection of the tabernacle; the manufacture of the appurtenances including the garments of the priests; and their sanctification
Laver Used for washing
Obedience Moses and Aaron
Priest Ablutions of
Purification Scriptures relating to Purification

LordThere are various Hebrew and Greek words so rendered.
MosesDrawn (or Egypt. mesu, “son;” hence Rameses, royal son). On the invitation of Pharaoh (Gen 45:17–25), Jacob and his sons went down into...

When they went בְּבֹאָם bĕbōʾām בּוֹא Verb · qal infinitive construct · with preposition, suffix: third person masculine plural
into the tent אֹהֶל ʾōhel אֹהֶל Noun · masculine singular construct
of the congregation מוֹעֵד môʿēd מוֹעֵד Noun · masculine singular
and when they came near אֶל ʾel Preposition וּבְקָרְבָתָם ûbĕqorbātām קָרַב Verb · qal infinitive construct · with and, preposition, suffix: third person masculine plural אֶל ʾel Preposition כַּאֲשֶׁר kaʾăšer Relative · with preposition
unto the altar הַמִּזְבֵּחַ hammizbēaḥ מִזְבֵּחַ Noun · masculine singular · with the
they washed יִרְחָצוּ yirḥāṣû רָחַץ Verb · qal imperfect, third person masculine plural
as the LORD יְהוָה yhwh יְהֹוָה Proper name
commanded צִוָּה ṣiwwâ צָוָה Verb · piel perfect, third person masculine singular
Moses אֶת ʾet Object marker מֹשֶׁה mōšê מֹשֶׁה Proper name

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