"[They are] descendants, one from another." Qatada said: Meaning, in intention, deed, and sincerity.
﴿ذُرِّيَّة بَعْضهَا من بعض﴾ قَالَ قَتَادَة: أَي: فِي النِّيَّة وَالْعَمَل وَالْإِخْلَاص