What is the ruling on giving usurious interest, withdrawn from a non-Islamic bank, to needy relatives periodically in the coming years, instead of disposing of it retroactively in a single lump sum?

You are obligated to repent of this sin and to dispose of the usurious profits by spending them on Muslim welfare projects or by giving them to the poor and needy. You must hasten to get rid of all ill-gotten gains, and it is not permissible to delay this, because repentance is not complete without expelling ill-gotten wealth.