Know that the probity of the witnesses must be established: the means of establishing it is a (great) sincerity: thou art dependent on that.
تزکیه باید گواهان را بدان ** تزکیش صدقی که موقوفی بدان
In the case of the word-witness, ’tis keeping thy word (that is the test); in the case of the act-witness, ’tis keeping thy covenant (to perform these acts).
حفظ لفظ اندر گواه قولیست ** حفظ عهد اندر گواه فعلیست
The word-witness is rejected if it speaks falsely, and the act-witness is rejected if it does not run straight.