俱舍論記 17.66

17.66

「如是五六七皆如理應知」者，此三不說，勸學應思。如先加行造惡色業貪等起時，隨四究竟名五俱轉，隨五究竟名六俱轉，隨六究竟名七俱轉。餘未說者，思擇可思。

Regarding "Likewise, five, six, and seven should all be known in accordance with principle": these three are not stated, encouraging students to consider them. For example, when greed and the like arise for evil material karma performed through prior preparation, if any four culminate it is called five functioning simultaneously; if any five culminate it is called six functioning simultaneously; if any six culminate it is called seven functioning simultaneously. As for the rest that are not stated, they can be thought through by discernment.