John Mark
Mark 1:35ESV·traditional attribution

And rising very early in the morning, while it was still dark, he departed and went out to a desolate place, and there he prayed.

Matthew Henry Presbyterian @wholebiblehenry

In these verses, we have, I. A particular account of one miracle that Christ wrought, in the cure of Peter's wife's mother, who was ill of a fever. This passage we had before, in Matthew. Observe, 1. When Christ had done that which spread his fame throughout all parts, he did not then sit still, as some think that they may lie in bed when their name is up.

Commenting on Mark 1:29-39

John Gill Reformed Baptist @doctorgill

And in the morning, rising up a great white before day,.... On the morrow after the sabbath, on the first day in the morning, notwithstanding the fatigue of the former day, through preaching and working miracles; yet he rose up very early while it was very much within the night, as the light and day were coming on, and before the day broke; though it...

Albert Barnes Presbyterian @notesbybarnes

Verses 35-37. And in the morning, rising up a great while before day. Luke says, (,) it was day. The passage in Mark means, in the original, not literally a great while before day, but very early, or while there was yet much appearance of night. The place in Luke means, at daybreak, at the beginning of day.