首楞嚴義疏注經 4.172

4.172

此舉七事，可喻七大，隨義對法可知。霾風而雨土也。霽雨，初止也。屯，聚也。

This adduces seven matters, which can illustrate the seven great elements, as can be known by matching them to the dharmas according to the meaning. 'Haze' (mai) is wind raining dust. 'Clearing' (ji) is when rain has just stopped. 'Gather' (tun) means to accumulate.