The Holy Quran 21:53 — Surah Al-Anbya
Arabic text
قَالُوا۟ وَجَدْنَآ ءَابَآءَنَا لَهَا عَـٰبِدِينَ
Translation
They replied, "We (worship them because we) found our forefathers worshipping (serving) them."
Tafsir (excerpt) — Tafsir Usmani
Blind imitation of forefathers: that is, granted that there is no testimony in our support from reason, from innate nature or from any transmission worth considering — so be it; but the weightiest proof of the truth and rightness of idol-worship is that from of old our forefathers have been worshipping these very ones.
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