The Holy Prophet(sa) further expounded this principle at another point in the following words:
“God states that, ‘I deal with My servant in accordance to the belief he holds of Me.’”1
This point is also a key to infinite prosperity but it is unfortunate that most people are unaware of this truth. In any case, a state of determination and belief is necessary in prayer and in normal circumstances it is unlawful to pray in doubtful words. However, this prohibition is only in the case when the supplicant employs such a method due to a lack of belief or attention. However, in special circumstances, if the supplicant stands upon a level of concentration and belief and then leaves the final decision of his matter to God, and due to this a state of distrust, inattention or a lack of belief is not developed, rather, a state of trust in Allāh and handing over the matter to Allāh is attained; in such a case, to pray in this manner would not be unlawful.
1 Ṣaḥīḥu Muslim, Kitābudh-Dhikri Wad-Du‘ā’i..., Bābul-Haththi ‘Alā Dhikrillāhi Ta‘ālā, Ḥadīth No. 6805
Ṣaḥīḥul-Bukhārī, Kitābut-Tauḥīd, Bābu Qaulillāhi Ta‘ālā Yurīdūna Aiń-Yubaddilū Kalāmallāhi, Ḥadīth No. 7505