Matthew 26:40

26:40 Then he came to the disciples and found them sleeping. He ¹  said to Peter, “So, couldn’t you stay awake with me for one hour?

Matthew 26:43

26:43 He came again and found them sleeping; they could not keep their eyes open. ² 

[26:40]  ¹ tn Here καί (kai) has not been translated.

[26:43]  ² tn Grk “because their eyes were weighed down,” an idiom for becoming extremely or excessively sleepy (L&N 23.69).