1 verse has
لَعَلَّنَا
in Edition Uthmani / Ash-Shu'araa (The Poets)

40:26لَعَلَّنَا نَتَّبِعُ ٱلسَّحَرَةَ إِن كَانُوا۟ هُمُ ٱلْغَٰلِبِينَ