41 The construction uses the infinitive construct after the preposition, followed by the subjective genitive.
42 The action precedes the action of preparing the gift, and so must be translated as past perfect.
43 Heb “eat bread.” The imperfect verbal form is used here as a historic future (future from the perspective of the past).

In other versions

they prepared the present for Joseph’s coming at noon, for they heard that they should eat bread there.

They prepared their gifts for Joseph’s arrival at noon, because they had heard that they were to eat there.

Since the men had heard that they were going to eat a meal there, they prepared their gift for Joseph’s arrival at noon.

They were told they would be eating there, so they prepared their gifts for Joseph’s arrival at noon.

Then they laid out the gift until Joseph came at noon, for they had heard that they were to eat food there.

And they made ready the present against Joseph came at noon: for they heard that they should eat bread there.

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