In which Shakespeare play is When ways be foul?

Answer 1

That is not an exact quotation, but something similar appears in the "Winter Song" at the end of Love's Labour's Lost:

When icicles hang by the wall

And Dick the shepherd blows his nail

And Tom bears logs into the hall

And milk comes frozen home in pail,

When blood is nipp'd and ways be foul,

Then nightly sings the staring owl, . Tu-whit;

Tu-who, a merry note,

While greasy Joan doth keel the pot.