Galatians 4:29

But, just as it was then --- the son born in the ordinary way [i.e., Ishmael] persecuting the one born according to the Holy Spirit's [leading, i.e., Isaac] --- so it is now [i.e., Jews urging compliance with the requirements of the law of Moses persecuting those who refuse to return to dependance on that law for salvation. See 3:1-3].

Galatians 4:22

For it is written in the law about Abraham's two sons [Gen. 16]; one [was] by his slave woman [Hagar] and the other by the free woman, [his wife, Sarah].

Hebrews 11:36

And [still] others experienced mockings and floggings, and were even chained up and put in prison.

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
For it is written in the law about Abraham's two sons [Gen. 16]; one [was] by his slave woman [Hagar] and the other by the free woman, [his wife, Sarah].
Hebrews 11:36
And [still] others experienced mockings and floggings, and were even chained up and put in prison.