وَاتَّقُوا الَّذِي أَمَدَّكُمْ بِمَا تَعْلَمُونَ أَمَدَّكُمْ بِأَنْعَامٍ وَبَنِينَ
Be mindful of the One who provided you with what you know; He provided you with livestock and sons. (Ash-Shu‘ara 26:132–133)
Bima ta‘lamun refers generally to known favors. The following amaddakum bi-an‘amin wa-banin supplies a concrete elaboration. It functions as a restatement or explanation, not as an unrelated additional report.
Rhetorical effect: A general mention invites the listener to ask what those favors are, and the immediate specification strengthens their appreciation.