Mark 13:35

13:35 Stay alert, then, because you do not know when the owner of the house will return – whether during evening, at midnight, when the rooster crows, or at dawn –

Mark 14:37

14:37 Then he came and found them sleeping, and said to Peter, “Simon, are you sleeping? Couldn’t you stay awake for one hour?

tn Here καί (kai) has been translated as “then” to indicate the implied sequence of events within the narrative.