Exodus 40:30 KJV

And he set the laver between the tent of the congregation and the altar, and put water there, to wash withal.

laver a large basin for washing Still heard today: a lavatory, first a washbasin, from the same Latin word Webster’s 1828 · Laver
withal with it; besides Webster’s 1828 · Withal

What these words mean in the King James Bible, and where you’ll still hear them today.

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 40:7 And thou shalt set the laver between the tent of the congregation and the altar, and shalt put water therein.
Exodus 30:18–21 Thou shalt also make a laver of brass, and his foot also of brass, to wash withal: and thou shalt put it between the tabernacle of the congregation and the altar, and thou shalt put water therein. …
Exodus 38:8 And he made the laver of brass, and the foot of it of brass, of the lookingglasses of the women assembling, which assembled at the door of the tabernacle of the congregation.
Ezekiel 36:25 Then will I sprinkle clean water upon you, and ye shall be clean: from all your filthiness, and from all your idols, will I cleanse you.
Hebrews 10:22 Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water.

From OpenBible.info, most relevant first.

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

And he set וַיָּשֶׂם wayyāśem שׂוּם Verb · qal sequential imperfect, third person masculine singular · with and
the laver אֶת ʾet Object marker הַכִּיֹּר hakkiyyōr כִּיּוֹר Noun · masculine singular · with the
between the tent בֵּין bên Preposition אֹהֶל ʾōhel אֹהֶל Noun · masculine singular construct וּבֵין ûbên Preposition · with and
of the congregation מוֹעֵד môʿēd מוֹעֵד Noun · masculine singular
and the altar הַמִּזְבֵּחַ hammizbēaḥ מִזְבֵּחַ Noun · masculine singular · with the
and put וַיִּתֵּן wayyittēn נָתַן Verb · qal sequential imperfect, third person masculine singular · with and
water מַיִם mayim מַיִם Noun · masculine plural
there, to wash שָׁמָּה šāmmâ Adverb · with ending: toward לְרָחְצָה lĕroḥṣâ רָחַץ Verb · qal infinitive construct · with preposition

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