Surah At-Taubah, Ayat 103-104

Ayat 103. Take Sadaqah (alms) from their wealth in order to purify them and sanctify them with it, and invoke Allah for them. Verily! Your invocations are a source of security for them, and Allah is All-Hearer, All-Knower.

Ayat 104. Know they not that Allah accepts repentance from His slaves and takes the Sadaqat (alms, charities) and that is Allah Alone is the One Who forgives and accepts repentance, Most Merciful?

Hazrat Abu Dharr (May Allah be pleased with him) reported: The Prophet  [SAWW](PBUH) said, "Allah, the Almighty, says: `Whosoever does a good deed, will have (reward) ten times like it and I add more; and whosoever does an evil, will have the punishment like it or I will forgive (him); and whosoever approaches Me by one span, I will approach him by one cubit; and whosoever approaches Me by one cubit, I approach him by one fathom, and whosoever comes to Me walking, I go to him running; and whosoever meets Me with an earth-load of sins without associating anything with Me, I meet him with forgiveness like that". [Muslim Hadith # 2687] 

Lesson : as mentioned above in Surah At-Taubah Ayat 104. "Allah Alone is the One Who forgives and accepts repentance, Most Merciful?" This Hadith mentions the infinite Compassion and Mercy of Allih to His obedient slaves and a special expression of which will be made by Him on the Day of Resurrection. On that Day, He will give at least ten times reward for each good deed. In some cases it may be far more than that, seven hundred times or more, as He would like. Such benevolence on His part warrants that a Muslim should never lose hope of His forgiveness.