For every cent means saving a precious life

Among the noble morals of Rasulullah s.a.w. in dealing with people is repaying the services of those who do good to him. As the hadith from Aisyah r.a.: 

"From Aisha r.a. she said: "The Messenger of Allah s.a.w. loved receiving gifts, and reciprocating them". (HR. Al-Bukhari) 

When someone gives a gift, he doesn't just enjoy it, but he also reciprocates - by giving a similar gift. Even in Ibn Abi Shaibah's narration it is explained that it turns out that the Prophet s.a.w.  return the gift with something better than the gift given to him. 

"And the Prophet responded with a better gift". (HR. Ibn Abi Shaibah) 

"On the authority of Abu Hurairah, on the authority of the Prophet s.a.w. who said: "Give each other gifts, you will surely love each other". (HR. Bukhari) 

It is true that sometimes the person who is given a gift does not have the capital to give more or even the same. So that there is a mutual exchange of gifts, based on the instructions of the Messenger of Allah, at least be answered with a prayer. 

On the authority of Abdullah bin Umar r.a. he said: The Messenger of God s.a.w. said: "Whoever asks you for the sake of Allah, then give, and whoever invites you, then come. And whoever gives you a gift, then return it, if you can't afford it then return it with a prayer". (HR. Ahmad)