Lady Aisha (may Allah be pleased with her) narrates that this verse was revealed regarding Tashahhud, « وَلَا تَجْهَرْ بِصَلَاتِكَ وَلَا تُخَافِتْ بِهَا » [ سورة الإسراء ] "And do not recite your prayer loudly, nor in a very low voice."