Verse 10

وَلَقَدْ ءَاتَيْنَا دَاوُۥدَ مِنَّا فَضْلًا يَـٰجِبَالُ أَوِّبِى مَعَهُۥ وَٱلطَّيْرَ وَأَلَنَّا لَهُ ٱلْحَدِيدَ

And We endowed David a bounty from Us. O you mountain, glorify along with him, as well as you O birds. And We softened the iron for him.