سُبْحَانَ ٱللَّٰهِ
Holy Qur'an
Al-Qur'an
Kids Qur'an
Or: "He grants it unto whomever He wills". Both these formulations are syntactically correct; but since the bounty of God referred to in this passage relates to the divine guidance granted to man through the medium of the revelation bestowed upon God's Apostle, the construction chosen by me seems to be more appropriate, expressing as it does the idea that the bounty of God's guidance is always available to one who sincerely desires it.
That is, according to His wise Will and Plan, and also as a result of His unbounded generosity to all.