وَجَعَلَهَا كَلِمَةَۢ بَاقِيَةٗ فِي عَقِبِهِۦ لَعَلَّهُمۡ يَرۡجِعُونَ ٢٨
And he made it1 a word remaining among his descendants that they might return [to it].
Translation: Saheeh International (English)
1 i.e., his testimony that none is worthy of worship except Allāh.
Each word's meaning and sound
And Abraham made this monotheistic statement of his remain in his progeny after him. There remained among them those who would worship Allah alone and not attribute any partners with Him, in the hope that they turn to Allah having repented from ascribing partners with Him and sins.
Al-Mukhtasar in interpreting the Noble Quran