Spirituals Song II Social Studies

I learnt a few things about Spirituals song.
We were given two songs which both have 2 things in common, the mention of Jordan which if no one knows is also a river, which can also be known as River Ohio or River Mississippi and the second thing is that the songs both have the mention of freedom in them or getting to freedom.

These songs were used on the fields as a sort of motive to keep going and to carry on and to tell others that "it's fine, we can escape now the coast is clear"
These songs were like codded words for the slaves on the field because only they would be able to understand the words, they were like words of comfort for the awaiting freedom that laid ahead of them.

https://www.youtube.com/watch?time_continue=93&v=v8frEt6w4G8&feature=emb_logo
"Swing low, Sweet Chariot" something yelled unexpectedly in the fields or sung softly in the dark of night. This phrase signalled that the coast was clear. and that the time to escape had come for them.
(This song also mentions The River Jordan)