The Mitzva of Loving the Convert & “King of the World” By A Convert, Nissim Black
https://www.ou.org/torah/mitzvot/sefer-hamitzvot/mitzvah_431_loving_the_convert/ Mitzvah 431: Loving the Convert by Rabbi Shalom Rosner
English Site at vilnagaon.org
Hebrew site at 60ribo.org.il
shalom rosner