Blood Donation
Question: Is it permissible for my brother to donate his blood to my wife?
Answer: There is no objection to that. If the need arises for your wife to be treated with a blood transfusion, she may receive blood from your brother or from anyone else; God willing, there is nothing wrong with that.

Persevering in Voluntary Acts
Question: I perform some voluntary prayers outside the prohibited times, I remember Allah with phrases of glorification and the declaration of His oneness, and I fast on various days. I do all of this without committing myself to any fixed schedule for fear that I might not keep it up and thus fall into blameworthy innovation. What is the ruling on that?
Answer: May Allah increase your eagerness for goodness. Abundant performance of supererogatory deeds—such as voluntary prayers and the remembrance of Allah through tahlil (saying la ilaha illa Allah), tasbih (saying subhan Allah), and takbir (saying Allahu akbar)—is commendable and legislated. Some voluntary prayers are tied to specific times, like the regular Sunnah prayers that accompany the obligatory prayers, whether before or after them. Likewise, the witr prayer is fixed in the night between the ‘Isha prayer and the break of dawn, and the tahajjud prayer in the later part of the night should also be maintained. Just as one should be constant in performing the regular Sunnah prayers alongside the obligatory ones, one should be even more diligent about witr.

A Muslim should also have a share of the night prayer, ending it with witr. The Duha prayer, too, is an established Sunnah of the Prophet (peace and blessings be upon him). These are acts of worship