[INDOLOGY] Sources of two verses

[Martin Gansten]

I'd be grateful for any help with identifying these two verses, relating 
to the concepts of sambandha and prayojana, quoted by Balabhadra in the 
early 17th century:

jñātārthaṃ jñātasambandhaṃ śrotuṃ śrotā pravartate |
granthādau tena vaktavyaḥ sambandhaḥ saprayojanaḥ ||

sarvasyaiva hi śāstrasya karmaṇo vāpi kasyacit |
yāvat prayojanaṃ noktaṃ tāvat tat kena gṛhyate ||

Thanks in advance,

Martin Gansten