This, via James Ward’s Heidegger’s Politics:
According to Otto Pöggeler, Heidegger would write, in a passage omitted from the published version of G53: “Perhaps the poet Hölderlin must become a Geschick of decisive confrontation for a thinker whose grandfather was born at the same time the ‘Ister Hymn’ and the poem ‘Andenken’ originated — according to the records, in the sheepfold of a dairy farm in Ovili, which lies in the upper Danube valley near the bank of the river, beneath the cliffs. The hidden history of Saying knows no accidents. Everything is dispensation [Schickung] ( “Heidegger’s Political Self-Understanding”, p. 223).