Adam Clarke on Mark 1:35

In the morning a great while before day - By πρωΐ, the morning, is to be understood the whole space of three hours, which finished the fourth watch of the night.

And there prayed - Not that he needed any thing, for in him dwelt all the fullness of the Godhead bodily; but that he might be a pattern to us. Every thing that our blessed Lord did he performed either as our pattern, or as our sacrifice.