Targum for Genesis 50:3

And the forty days of embalming were completed to him; for so fulfil they the days of embalming; and the Mizraee lamented him seventy days; saying one to another, Come, let us lament over Jakob the Holy, whose righteousness turned away the famine from the land of Mizraim. For it had been decreed that there should be forty and two years of famine, but through the righteousness of Jakob forty years are withheld from Mizraim, and there came famine but for two years only.