John Gill Commentary Genesis 43:10

"for except we had lingered, surely we had now returned a second time." — Genesis 43:10 (ASV)

For except we had lingered
Delayed going down to Egypt, through the demur Jacob made of taking Benjamin with them: surely by now we would have returned a second time;
they would have made their journey to Egypt, and returned again with their corn, and their brother Benjamin too, as Judah supposed, before this time; so that by these delays they were losing time, and involving themselves and families in distress for want of corn.