Balabhadra in the early 17th century quotes several verses on the topic of niyati/daiva and karma. I have found some of these in other works but not others, and even for the ones I have found, I suspect there are earlier or more common sources. Any help with attributing the following would be much appreciated:

1. Attributed to Śaunaka:

yena tu yat prāptavyaṃ tasya vidhānaṃ sureśasacivo ’pi |
yaḥ sākṣān niyatijñaḥ so ’pi na śakyo ’nyathā kartum || iti |

2. No attribution, but found (with variants) in Pañcadaśī 156 and Mahāsubhāṣitasaṃgraha 3283:

avaśyambhāvibhāvānāṃ pratīkāro bhaved yadi |
tadā duḥkhair na bādhyeran nalarāmayudhiṣṭhirāḥ ||

3. No attribution, but apparently popular -- found (with variants) in Nāradapurāṇa 1.31.69 and 2.29.18 and Mahāsubhāṣitasaṃgraha 3292 (also quoted in Āyurvedadīpikā and Satyaśāsanaparīkṣā); the question is what would be either the earliest source or the most common/typical one in the early 1600s:

nābhuktaṃ kṣīyate karma kalpakoṭiśatair api |
avaśyam eva bhoktavyaṃ kṛtaṃ karma śubhāśubham ||

4. Attributed simply to smṛti:

hanyate durbalaṃ daivaṃ pauruṣeṇa vipaścitā

Many thanks in advance!

Martin Gansten