وَنَسْأَلُ اللَّهَ تَعَالَى أَنْ يُثَبِّتَنَا عَلَى الْإِيمَانِ وَيَخْتِمَ لَنَا بِهِ.
We ask Allah Most High to keep us firm upon faith and to grant that our lives end in that faith.
Reading the terms: Yuthabbitanā asks for ongoing steadfastness; yakhtima lanā bih asks that one’s life end upon faith.
Boundary of meaning: Faith at one point in time does not dispense with perseverance. Learning, living, praying and seeking divine help belong together.
Takeaway: The prayer seeks firmness in faith and a faithful end.