Is contemplation a prerequisite for the morning and evening remembrances (adhkar) to attain the reward associated with them, such as the reward for reciting Ayat al-Kursi after prayers, that "nothing will prevent him from entering Paradise except death," and the reward for reciting the Mu'awwidhatayn (Surahs Al-Falaq and An-Nas), that "nothing will harm him"?

It is more befitting for a Muslim to always contemplate the Qur’an and the adhkar (remembrances). Reward is hoped for one who recites without contemplation, because moving the tongue with remembrance, even with heedlessness, is better than backbiting and absolute silence, even if it is incomplete compared to the heart's action. The contemplations of the one who remembers the meanings of what he is remembering is more complete, but the absence of contemplation does not prevent the establishment of the promised reward for the adhkar, as the reward has not been conditioned upon contemplation and understanding.