Genesis 18:4
wash ... feet <07272 07364> [wash your feet.]
In those ancient times, shoes such as ours, were not in use; and the foot was protected only with sandals or soles, fastened round the foot with straps. It was, therefore, not only necessary from motives of cleanliness, but also a very great refreshment, in so hot a country, to get the feet washed at the end of a day's journey; and this is the first thing that Abraham proposes.
tree <06086> [tree.]
Rest in the shade was the second requisite for the refreshment of a weary traveller.
Genesis 19:2
turn <05493> [turn.]
wash <07364> [wash.]
Stay ....................... spend <03885> [Nay.]
Instead of lo, nay, some MSS. have lo, to him. "And they said unto him, for we lodge in the street;" where, nevertheless, the negation is understood. Knowing the disposition of the inhabitants, and appearing in the character of mere travellers, they preferred the open street to any house; but not yet willing to make themselves known, as Lot pressed them vehemently, and as they knew him to be a righteous man, they consented to take shelter under his hospitable roof.
