وَاللَّهُ الْمُسْتَعَانُ عَلَىٰ مَا تَصِفُونَ
And Allah is the One sought for help against what you describe.
The closing ʿalā mā taṣifūn makes explicit the matter regarding which help is sought. The expression already supplies a relevant complement; there is no need to fill the line with speculative unspoken phrases.
Good analysis identifies what is present, what it modifies or complements, and what relation it carries. Calling an overtly supplied relation “ellipsis” simply because a longer sentence can be imagined confuses brevity with omission.