إِنْ كَثُرَتْ فِيهَا الْوَسَائِطُ سُمِّيَتْ تَلْوِيحًا
When kinayah involves numerous intermediate links, it is called talwih.
In «كَثِيرُ الرَّمَادِ», one must pass from ash to fire, from fire to cooking, from cooking to feasting, and from feasting to generosity. Such a long chain of inference is the characteristic feature of talwih.