The source gives an followed by past qālū. An qālū is still interpreted as “their saying”; a past verb is built, so no subjunctive marking appears on it.
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An Can Also Precede a Past Verb
Infinitival Particles: Mā, An and Anna
The source gives an followed by past qālū. An qālū is still interpreted as “their saying”; a past verb is built, so no subjunctive marking appears on it.