The Quran

هُمُ الَّذينَ يَقولونَ لا تُنفِقوا عَلىٰ مَن عِندَ رَسولِ اللَّهِ حَتّىٰ يَنفَضّوا ۗ وَلِلَّهِ خَزائِنُ السَّماواتِ وَالأَرضِ وَلٰكِنَّ المُنافِقينَ لا يَفقَهونَ

Muhammad Asad

It is they who say [to their compatriots¹], "Do not spend anything on those who are with God's Apostle, so that they [may be forced to] leave."² However, unto God belong the treasures of the heavens and the earth: but this truth the hypocrites cannot grasp.

I.e., to the people of Medina in general, and to the ansar in particular (see next note).
The leader of the hypocrites of Medina, Abd Allah ibn Ubayy, never forgave the Prophet for having overshadowed him who previously had been unquestioningly recognized by the people of Medina as their most outstanding leader. Since the Prophet's political strength depended mainly on the Meccan Muslims who followed him in his hijrah to Medina, Ibn Ubayy tried to persuade his compatriots - many of whom were supporting the newcomers with all the means at their disposal - to withdraw this material support and thereby force the muhajirun, most of whom were very poor, to leave Medina: a stratagem which, if successful would have greatly weakened the Prophet's position. This suggestion of the leader of the hypocrites was, of course, rejected by the ansar.