Is writing "Indeed, to Allah we belong and to Him we shall return" in this manner incorrect?

Writing the phrase of istirja' (uttering "إنا لله وإنا إليه راجعون" - "Indeed we belong to Allah, and indeed to Him we will return") upon a calamity, by dropping the alif from (إنا - 'inna'), is a common spelling mistake. This is because the alif is the noun of (إنّ - 'inna'), and removing it eliminates a core component of the sentence. It is crucial to ensure its correction, as it is part of a verse in Surat Al-Baqarah.