Shaikh Muhammad Bazmoul, may Allāh protect him, said:
My religion has taught me…
…that there is no problem with my benefiting from the findings and experience of others about how this world and life work–even if they were disbelievers.
From Judāmah bint Wahb, may Allāh be pleased with her, [who] said: I heard the Messenger of Allāh ﷺ say: “[By Allāh,] I considered prohibiting al-ghīlah; then I thought about the Romans and Persians–it turned out they were doing al-ghīlah to their children without that harming their children in the slightest.” (Muslim reported it.)
And ʿUmar ibn Al-Khaṭṭāb, may Allāh be pleased with him, established ledgers in the manner the Persians used to, and the Companions, may Allāh be pleased with them, were in approval of [that].
Al-Ghīlah is a woman’s breastfeeding her baby while she is pregnant. It has [also] been said it is a man’s coming to [to have sexual relations with] his wife while she is breastfeeding. The first [of the two explanations] is the well known meaning.
Bazmoul, Muhammad. Silsilah ʿAllamanī Dīnī, 1425 H, p. 63.