JST Luke 6:31 Therefore give to every man who asketh of thee; and of him who taketh away thy goods, ask them not again.
JST Matt 5:44 Give to him that asketh of thee; and from him that would borrow of thee, turn not thou away.
3 Nephi 12:42 Give to him that asketh thee, and from him that would borrow of thee turn thou not away.
Repeated three times.
Those who love God, who trust God, who believe the scriptures, who believe God asks this of his disciples, and who desire to be the disciples of God that they may become even as God is, will keep God's word.
Objection: By giving everyone who asks what they ask for you potentially facilitate their bad choices and reinforce maladaptive behavior. Those are bad things that shouldn't be done for the good of the recipient.
Answer: Here is hidden wisdom. We learn by experience - indeed, experience is how we become persuaded of what is good and what is evil. When we give someone what they ask for, we are merely accelerating them down their freely chosen path that they may gain experience. If one should hit the end of one's chosen path and observe that one doesn't like where one has ended up, or if one discovers the end of that path is not what they want before hitting the end, then one may change one's mind and choose a different path - repent, in other words. On the other hand, if one is only prevented from travelling a path by lack of means, then one cannot understand why one might not want to travel down that path, and will still desire to take that path; it is by our desires and our works that we are judged. Therefore you haven't done them any favors by withholding from them, and you have not gained the experience that you otherwise would have if you had been obedient to Jesus's commandment.
Recall the parable of the prodigal son. The father represents God.