شاء من شاء وأبى من أبى - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

Literally: “may whoever wants it want it and whoever refuses refuse”, implying that it does not make a difference.

شاءَ مَنْ شاءَ وَأَبَى مَنْ أَبَى • (šāʔa man šāʔa waʔabā man ʔabā)

1. willy-nilly

• طَوْعاً أَوْ كَرْهاً (ṭawʕan ʔaw karhan)