3 verses have
grain
in Edition Clear Qur'an by Talal Itani / Al-An'aam (The Cattle)

6:59With Him are the keys of the unseen; none knows them except He. And He knows everything on land and in the sea. Not a leaf falls but He knows it; and there is not a single grain in the darkness of earth, nor is there anything wet or dry, but is in a clear record.

6:95It is God Who splits the grain and the seed. He brings the living from the dead, and He brings the dead from the living. Such is God. So how could you deviate?

6:99And it is He who sends down water from the sky. With it We produce vegetation of all kinds, from which We bring greenery, from which We produce grains in clusters. And palm-trees with hanging clusters, and vineyards, and olives, and pomegranates—similar and dissimilar. Watch their fruits as they grow and ripen. Surely in this are signs for people who believe.