You may have heard the phrase "84,000 dhammakkhandha" (Dhamma teachings) which is the traditional Theravada description of the complete Buddha's Teaching. Of course in the commentaries (atthakatha) it is explained in this way, which cannot be historically true:
Sutta pitaka = 21,000 dhammakkhandhas
Vinaya pitaka = 21,000 dhammakkhandhas
Abhidhamma pitaka = 42,000 dhammakkhandhas
See also http://www.thisismyanmar.com/nibbana/tobudha4.htm (at the bottom)
When we search in the Tipitaka, we can find only 2 places where it occurs:
http://openpali.worldtipitaka.org/word_ ... habet=#top
It is the Theragatha text that belongs to the "early part" of the Tipitaka. The Buddha himself does not use this term, but Ananda mentions it in his verses:
1027. Dvāsīti buddhato gaṇhiṃ,
dve sahassāni bhikkhuto;
Caturāsītisahassāni,
ye me dhammā pavattino.
http://studies.worldtipitaka.org/tipita ... 7.1/17.1.3
82,000 (teachings) from the Buddha I have received;
2,000 more from his disciples;
Now 84,000 teachings are familiar to me.
— the Venerable Ananda,
in Theragatha 17.3 (vv. 1024-29)
Thai version:
พระอานนทเถระได้เรียนธรรมจาก พระพุทธเจ้ามา ๘๒,๐๐๐ ธรรมขันธ์ ได้เรียนมาจากสำนักภิกษุมีพระธรรม
เสนาบดีเป็นต้น ๒,๐๐๐ ธรรมขันธ์ จึงรวมเป็นที่คล่องปากขึ้นใจ๘๔,๐๐๐ ธรรมขันธ์
http://www.84000.org/tipitaka/pitaka2/v ... 134&Z=8214
If we look at the original Pali text, only the numbers 82,000 and 2,000 and 84,000 are mentioned in it, together with "dhamma" meaning "teachings" in this context (the word "dhammakkhandha" does not appear at all).
15. In the Theragatha (v. 1024) Venerable Ananda says that he knew 82,000 of the Buddha's discourses as well as 2,000 by the monks. This works out, over a vigorous forty-five year ministry, to nearly five discourses a day. This is sizable, but many of them are but a few lines, so it is not impossible. However, we should bear in mind that the numerical precision so highly valued in Western culture has been and still is of little importance in Indian culture: these figures are best understood as "a very great many". In India a different sort of precision -- Ananda's -- was valued. (See A. X,95 (v,193-5).)
http://www.buddhanet.net/budsas/ebud/be ... in2.htm#15
That means all the Dhamma teachings remembered by Ananda, as he recited them at the First Sangayana, or we could call it the "original Sutta texts" before more texts have been added later. We can regard these as the authentic teachings, some of them words of the Buddha (buddhavacana) and some of them the words of direct disciples of the Buddha (e.g. Theragatha, Therigatha, and the Suttas spoken by Sariputta, Moggallana, Ananda, Kaccayana, Dhammadinna, etc.).

