John Gill Commentary Mark 1:36

"And Simon and they that were with him followed after him;" — Mark 1:36 (ASV)

And Simon, and they that were with him
Peter, and his brother Andrew, together with James and John,

followed after him ;
some time after he was gone; for he privately withdrew from them, so that they might not be aware when he went, nor apprized of his departure, for some considerable time; which when they were, they set out, in diligent search, and eager pursuit after him, until they found him.