How sound is the statement attributed to Ibn al-Qayyim in his interpretation of the verse: "And those who feared their Lord will be led to Paradise in groups," that Allah refuses to let people enter Paradise individually, and that every companion group will enter Paradise together?

The statement is correct in meaning and is supported by what is mentioned in Al-Sa'di's تفسير (exegesis) regarding the people of Paradise: "{And those who feared their Lord will be driven} (سِيقَ) with honor {to Paradise in throngs (زُمَرًا)}" joyful and delighted, with each throng accompanied by those whose deeds are similar to theirs. However, the statement mentioned in the question cannot be attributed to Ibn al-Qayyim.