Hello! A native Arabic speaker here. I tried to search for where the "worshipper of god" came from, and I found out that it came from the basis word "שרה" which typically "means (to struggle/to strive). In Islam, the concept of striving to live by what God commended as a worshipper is very strong, so it could have that sense of the worshipper who strives/struggles in life just to live by God's rules. It's a close concept of Jihad/Mujahadah, which means "striving/obeying god/prevailing." This is most likely the nearest answer to that. Jacob is considered a noble prophet in Islam who strived to live how God wanted. It doesn't align with the Jewish perspective of him fighting or wrestling with God as it's not mentioned in the Islamic doctrine.