Galatians 4:29

but just as in the old days the son born by the flesh persecuted the son born by the Spirit, so it is still to-day.

Galatians 4:22

Surely it is written in the Law that Abraham had two sons, one by the slave-woman and one by the free-woman;

Hebrews 11:36

others, again, had to experience scoffs and scourging, aye chains and imprisonment ??37 they were stoned, sawn in two, and cut to pieces; they had to roam about in sheepskins and goatskins, forlorn, oppressed, ill-treated

Treasury of Scripture Knowledge

Summary

And Sarah saw the son of Hagar the Egyptian, which she had born unto Abraham, mocking.

Bible References

Mocking

Galatians 4:22
Surely it is written in the Law that Abraham had two sons, one by the slave-woman and one by the free-woman;
Hebrews 11:36
others, again, had to experience scoffs and scourging, aye chains and imprisonment ??37 they were stoned, sawn in two, and cut to pieces; they had to roam about in sheepskins and goatskins, forlorn, oppressed, ill-treated