﴿ وَٱلَّذِينَ هُمْ لِأَمَٰنَٰتِهِمْ وَعَهْدِهِمْ رَٰعُونَ ﴾

“and who are faithful to their trusts and to their pledges,”

And who are keepers of their trusts may be read as plural amānātihim ‘their trusts’ or singular amānatihim ‘their trust’ and covenants made between them or between them and God such as the observance of prayer and so on.