An extract from Miller's Exposition of the Twenty-fourth of Matthew—Page 18.
"He also told them to pray 'that their flight be not in the Winter:' for if in the Winter, destitute and naked as they must be in their flight, the consequences would be very disastrous—they would suffer with cold and hunger. 'Neither on the Sabbath-day.' Because it was to be kept as a day of rest, and no servile work was to be done on that day, nor would it be right for them to travel on that day. Christ has in this place sanctioned the Sabbath, and clearly shows us our duty, to let no trivial circumstance cause us to break the law of the Sabbath. Yet how many, who profess to believe in Christ, at this present day, make it a point to visit, travel, and feast on this day! What a false-hearted profession must that person make who can thus treat with contempt the moral law of God and despise the precepts of the Lord Jesus! We may here learn our obligation to remember the Sabbath day to keep it holy."