John Lightfoot on John 11:39

[For he hath been dead four days.] The three days of weeping were now past, and the four days of lamentation begun: so that all hope and expectation of his coming to himself was wholly gone.

"They go to the sepulchres, and visit the dead for three days. Neither are they solicitous lest they should incur the reproach of the Amorites." The story is, They visited a certain person, and he revived again, and lived five-and-twenty years, and then died. They tell of another that lived again, and begot children, and then died.

"It is a tradition of Ben Kaphra's: The very height of mourning is not till the third day. For three days the spirit wanders about the sepulchre, expecting if it may return into the body. But when it sees that the form or aspect of the face is changed, then it hovers no more, but leaves the body to itself."

"They do not certify of the dead" [that this is the very man, and not another] 'but within the three days after his decease': for after three days his countenance is changed."