Midrash Genesis Rabbah 46:10 conflates the identity of Monobaz I with King Ptolemy, “‘And circumcise the flesh of your foreskin’ (Gen 17:1): [The foreskin] hangs on the body like a sore (nomi). It happened that king Munbaz and Zawatus (=Izates), the sons of King Ptolemy, were sitting and reading the book of Genesis. When they came to this verse, ‘and circumcise the flesh of your foreskin,’ one turned his face to the wall and began to cry, and the other turned his face to the wall and [also] began to cry.
Midrash Genesis Rabbah 46:10 mistakenly identifies Monobaz I with King Ptolemy, “‘And circumcise the flesh of your foreskin’ (Gen 17:1): [The foreskin] hangs on the body like a sore (nomi). It happened that king Munbaz and Zawatus (=Izates), sons of King Ptolemy, were sitting and reading the book of Genesis. When they came to this verse, ‘and circumcise the flesh of your foreskin,’ one turned his face to the wall in distress and began to weep, and the other also turned his face to the wall in distress and [also] began to weep.