מדרש על בראשית 16:6

Resh Lakish said: "He who suspects an innocent man will receive bodily punishment, for it is written (Ex. 4, 1.) But, behold, they will not believe me. It was known to the Holy One, praised be He! that Israel would believe him and He said unto Moses, 'They are believers, the children of believers, but I know thou wilt finally not believe.' They are believers, as it is written (Ib. ib. 31.) And the people believed. The children of believers, as it is written (Gen. 16, 6.) And they believed in the Lord. Thou wilt finally not believe, as it is said (Num. 20. 12.) Because ye have not had confidence in Me. Whence do we learn that he was punished? It is written (Ex. 4. 6.) And the Lord said furthermore unto him, 'Do put thy hand upon thy bosom.' etc." Raba. and according to others. R. Jose, the son of R. Chanina, said: "The measure of Divine Goodness comes more quickly than that of evil dispensation; for in the case of evil dispensation, it is written (Ib.) And when he took it out, behold, his hand was leprous, white as snow. As to the Divine Goodness, it is written (Ib.) And when he pulled it away from his bosom, behold, if has turned again as his other flesh, i.e., as soon as he pulled it away from his bosom, it had turned again as his other flesh." And Aaron's staff swallowed up their staves (Ib. 7, 12). R. Elazar said: "This was a miracle within a miracle."

...'And Avram said to Sarai: do it her what is good in your eyes!' (Gen. 19:6) He said to her: "what do I care about her well being or her harm? [But] It is written: 'You will not deal with her as a slave since you humbled her' (Deuteronomy 21:14), and this one, after we made her suffer, we will enslave her? I don't care about her well being or her harm. [But] It is written 'he shall not have the right to sell her to foreigners, since he broke faith with her' (Exodus 21:8) and this one, after we made her a master we will make her a slave? I don't care about her well being or her harm." 'Then Sarai treated her harshly, and she ran away from her.' Rabbi Aba bar Kahana said: she forbade her from having sexual relations. Rabbi Berachia said: she slapped her face with a slipper. Rabbi Berachia in the name of Rabbi Aba Bar Kahana said: She made her carry water buckets and bath towels to the baths."A