وَمَآ ءَاتَيْنَـٰهُم مِّن كُتُبٍ يَدْرُسُونَهَا ۖ وَمَآ أَرْسَلْنَآ إِلَيْهِمْ قَبْلَكَ مِن نَّذِيرٍ Qur’an Saba (34:44)Wam a a tayn a hum min kutubin yadrusoonah a wam a arsaln a ilayhim qablaka min na th eer in
Lit., "which they could study", i.e., in support of the blasphemous beliefs and practices inherited from their ancestors. Cf. 30:35 , which expresses a similar idea.
The ancestors (as in the case of the Arabs of the Times of Ignorance) had received no revelation of the clear kind which a messenger and a Book bring them. This is a reason for welcoming, not for rejecting new Truth.