Must an orphaned girl who was adopted by a man unrelated to her wear a hijab in front of him after reaching puberty? And what are the Sharia matters that the man must observe in this adoption, taking into consideration that he did not give her his name, and his intention is to gain the reward mentioned in the Hadith of the Prophet, peace and blessings be upon him: "Whoever raises two girls until they reach puberty and marry, he and I will be like these two on the Day of Resurrection"?

Whoever undertakes the care of girls and sisters until they reach maturity will attain the virtue of accompanying the Prophet, peace and blessings be upon him, in Paradise. Likewise, the guardian of an orphan (whether a relative or a stranger) will be with the Prophet, peace and blessings be upon him, in Paradise, like these two [fingers]. Legitimate adoption involves caring for an orphan and managing their affairs without attributing them to the one who adopted them. If the fostered girl reaches puberty, her guardian is considered a stranger to her, and it is not permissible for her to uncover her face to him or to be in seclusion with him. However, she should maintain ties with him through greetings and inquiries as a token of gratitude for his kindness.