وَلِوَقْتِ كُلِّ صَلَاةٍ، وَقَبْلَ غُسْلِ الْجَنَابَةِ، وَلِلْجُنُبِ عِنْدَ أَكْلٍ وَشُرْبٍ وَنَوْمٍ وَوَطْءٍ، وَلِغَضَبٍ، وَلِقُرْآنٍ وَحَدِيثٍ وَرِوَايَتِهِ وَدِرَاسَةِ عِلْمٍ
Also recommended: at each prayer time; before Ghusl of Janabah; for a Junub person before eating, drinking, sleeping or intercourse; when angry; for Quran recitation, Hadith, narrating Hadith, and studying knowledge.