One of them opened his sack - From Genesis 42:35 we learn that each of the ten brethren on emptying his sack when he returned found his money in it; can we suppose that this was not discovered by them all before? It seems not; and the reason was probably this: the money was put in the mouth of the sack of one only, in the sacks of the others it was placed at or near to the bottom; hence only one discovered it on the road, the rest found it when they came to empty their sacks at their father's house.

In the inn - במלון bammalon, from לן lan, to lodge, stay, remain, etc. The place at which they stopped to bait or rest themselves and their asses. Our word inn gives us a false idea here; there were no such places of entertainment at that time in the desert over which they had to pass, nor are there any to the present day. Travellers generally endeavor to reach a well, where they fill their girbahs, or leather bottles, with fresh water, and having clogged their camels, asses, etc., permit them to crop any little verdure there may be in the place, keeping watch over them by turns. This is all we are to understand by the malon or inn in the text, for even caravansaries were not then in use, which are generally no more than four walls perfectly exposed, the place being open at the top.

the inn.

Genesis 43:21 And it came to pass, when we came to the inn, that we opened our sacks, and, behold, every man's money was in the mouth of his sack...

Genesis 44:11 Then they speedily took down every man his sack to the ground, and opened every man his sack.

Exodus 4:24 And it came to pass by the way in the inn, that the LORD met him, and sought to kill him.

Luke 2:7 And she brought forth her firstborn son, and wrapped him in swaddling clothes, and laid him in a manger...

Luke 10:34 And went to him, and bound up his wounds, pouring in oil and wine, and set him on his own beast, and brought him to an inn...

inn. {Malon,} from {loon,} to stay, abide, lodge, denotes any place to stay and lodge in, particularly a place where travellers usually stop to lodge, which is generally near a well, where they fill their {girbehs,} or leathern bottles, with fresh water, and having unladen and clogged their camels, asses, etc., permit them to crop any little verdure there may be in the place, keeping watch over them by turns. Our word inn here gives us a false idea, there were no such places of entertainment in the desert which Joseph's brethren had to pass; nor are there any at the present day. The only accommodation such a place affords is either a well, or a {khan,} or {caravanserai,} which is generally no more than four bare walls, perfectly exposed, the place being open at the top, and furnishing a wretched lodging: and even these, it is probable, were not in use at this early period.

Spiritual Hunger Shall be Satisfied
They shall be filled. Matthew 5:6 I proceed now to the second part of the text. A promise annexed. They shall be filled'. A Christian fighting with sin is not like one that beats the air' (1 Corinthians 9:26), and his hungering after righteousness is not like one that sucks in only air, Blessed are they that hunger, for they shall be filled.' Those that hunger after righteousness shall be filled. God never bids us seek him in vain' (Isaiah 45:19). Here is an honeycomb dropping into the mouths of …
Thomas Watson—The Beatitudes: An Exposition of Matthew 5:1-12