Yes, it is permissible to pray silently in your mind in Islam under certain circumstances. In Islamic prayer, there are two main types of prayers: Salah (obligatory prayers) and Du'a (supplications or voluntary prayers). The permissibility of praying silently in your mind depends on the type of prayer you are performing:
Salah (Obligatory prayers): For the five daily obligatory prayers (Fajr, Dhuhr, Asr, Maghrib, and Isha), it is generally preferred to recite the Quranic verses and specific phrases out loud during some parts of the prayer. These parts are known as the "audible" (Jahri) recitations. Other parts of the prayer, known as the "silent" (Sirri) recitations, are recited quietly or in a whisper. In these silent recitations, you can pray in your mind without audibly voicing the words.
Du'a (Supplications or voluntary prayers): Du'a is the act of personal supplication to Allah, where you can make requests, seek forgiveness, and express gratitude. Du'a can be made silently in your mind or in a whisper, as there is no specific requirement to recite Du'a out loud.
However, it is essential to note that there are specific guidelines and etiquettes for performing prayers in Islam, whether they are obligatory prayers or voluntary supplications. It is recommended to seek knowledge and guidance from knowledgeable scholars or reputable sources to understand the proper way to pray and recite in different situations.
In summary, praying silently in your mind is permissible and commonly practiced in Islam, especially during the silent recitations of obligatory prayers (Salah) and when making personal supplications (Du'a).