﴿ مُّسَوَّمَةً عِندَ رَبِّكَ ۖ وَمَا هِىَ مِنَ ٱلظَّٰلِمِينَ بِبَعِيدٍۢ ﴾

“marked out in thy Sustainer's sight [for the punishment of such as are lost in sin]. And these [blows of God-willed doom] are never far from evildoers”

marked each one of them with the name of the person it would strike with your Lord ‘inda rabbik is an adverbial qualifier for these stones and they the stones — or their lands — are not far from the evildoers that is from the people of Mecca.