Note that the psalmist first mentions an individual “man ” and then changes to the plural“ upright ones ” in the latter part of verse 2.
وَيَدُلُّ ذلِكَ أَنَّ ٱلْمَزْمُورَ ١١٢ يُشِيرُ إِلَى فَرِيقٍ مُؤَلَّفٍ مِنْ أَفْرَادٍ عَدِيدِينَ .‏