McClintock and Strong’s Cyclopedia explains that the significance of saying “Amen ” at the end of prayers is“ to confirm the words which have preceded, and invoke the fulfilment of them. ”
وَلكِنْ يَنْبَغِي أَنْ نَهْتَمَّ بِشَكْلٍ رَئِيسِيٍّ بِمَصَالِحِ يَهْوَه .‏