Calling (all) such as turn their backs and turn away their faces. And collect and hide it.
meaning, the Fire will call out to its children whom Allah created for it, determining that they will perform the deeds deserving of it in the worldly life. So it will call them on the Day of Judgement with an eloquent and articulate tongue. Then it will pick them out from the people of the gathering just as birds pick seeds. This is because they were, as Allah said, of those who turned their backs and turned away.
This means they denied with their hearts and abandoned the performance of deeds with their limbs.
وَجَمَعَ فَأَوْعَى
And collect and hide it.
meaning, he gathered wealth piling it up, and he concealed it,
meaning he hid it and refused to give the obligatory right of Allah that was due on it of spending and paying the Zakah.
It has been recorded in a Hadith that the Prophet said,
لَاا تُوعِي فَيُوعِيَ اللهُ عَلَيْك
Do not hold back (your wealth) or else Allah will hold back from you.