ENOfficial
Ibn 'Abbas said that he said that "the squanderers" were those who wasted money incorrectly.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَارِمٌ، قَالَ: حَدَّثَنَا هُشَيْمٌ، قَالَ: حَدَّثَنَا حُصَيْنٌ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ: {الْمُبَذِّرِينَ}، قَالَ: الْمُبَذِّرِينَ فِي غَيْرِ حَقٍّ.
sunnah.com