Paying zakah early

It is narrated from al-Hakam that the Prophet (peace and blessings be upon him) sent a collector to collect zakah. He came to Sayyiduna al-Abbas (may Allah be pleased with him) and asked him for the zakah. Sayyiduna al-Abbas said to him: I have already paid the zakah of my wealth for two years in advance. The collector came to him (peace and blessings be upon him) and told him this. He (peace and blessings be upon him) said: "My uncle has spoken the truth."

Ata said: There is no harm in paying zakah early.

Something similar is narrated from Sa'id bin Jubayr.

Ibrahim said: There is no harm in your paying the zakah of your wealth early (in advance) and counting it towards what is coming.

Al-Hasan said: When you pay the whole zakah early, there is no harm in it.

Hafs bin Sulayman said: I asked al-Hasan about a man who paid the zakah of three years together at once (is that right)? He said: It suffices him (doing so is permissible).

Al-Dahhak said: There is no harm in paying zakah before the year is complete.

Al-Hakam said: There is no harm in paying zakah early.

Umar bin Yunus said: Al-Zuhri saw no harm in a person paying his zakah before the year is complete.

Ibn Sirin said: I do not know what this is: paying zakah before it falls due, a month or two months early?