They have taken away - That is the disciples or friends of Jesus who had laid him there. Perhaps it was understood that the body was deposited there only to remain over the Sabbath, with an intention then of removing it to some other place of burial. Hence, they hastened early in the morning to make preparation, and Mary supposed they had arrived before her and had taken him away.
Related Commentaries of John 20:13
John 20:13
13 And they say unto her, Woman, why weepest thou? She saith unto them, Because they have taken away my Lord, and I know not where they have laid him.