"Parting Friends" has also been collected in the 1991 edition of The Sacred Harp (#267); the text at fasola.org consists of only the one verse. The source was probably the 1855 Social Harp. There are two other songs there also called "Parting Friends" and one called "Parting Friend". I believe I have a full copy somewhere of "Parting Friends" from the Social Harp.

I have at least two recordings: by Boston Camerata on Liberty Tree, and by Hesperus on Colonial America (instrumental arrangement). The liner notes for the former state that "Parting Friends" is related to two other folk spirituals, "Wayfaring Stranger" and "Fulfillment". Sadly, it was not selected for the recording The Social Harp.

Jeremiah Ingalls wrote a song called "Judgement Hymn" whose tune is a variant of that used for "Fulfillment" and "Parting Friends". It was published in his Christian Harmony (1805)--much earlier than either the Sacred Harp (1844) or the Social Harp (1855). The text follows:

Judgement Hymn

That great, tremendous day's approaching,
That awful scene is drawing nigh,
Which was foretold by ancient prophets,
Decreed from all eternity.
Prepare my soul, reflect and wonder,
That awful scene in drawing near,
When you shall see the great transaction,
When Christ in judgment shall appear.

Go forth you heralds with speed like lightning,
Call in your saints from distant lands,
Those that my blood from hell have ransomed,
Whose names in life's fair book do stand.
For your dear souls, that have continued,
With me and my temptations bore.
I have provided for you, a kingdom,
To reign with me forevermore.

And drifting a bit off-topic, I have a note here that Ingalls' song "Wisdom" was set to the tune of "The Parting Glass", while his "Endless Day" was set to "Nae luck about the hoose".