Parallel
Exodus 40:31
Swete's Septuagint · Berean Standard Bible
εἰ δὲ μὴ ἀνέβη ἡ νεφέλη, οὐκ ἀνεζεύγνυσαν ἕως ἡμέρας ἦς ἀνέβη ἡ νεφέλη.
and from it Moses, Aaron, and his sons washed their hands and feet.