Compare Malachi 3:10 and 1 Enoch 11:1

"... The instruction of the fallen angels encourages humankind to become involved with items related to wealth, i.e., precious stones, jewellery, and gold, which lead to violence and an excessive lifestyle. Enoch’s wisdom involves cosmological secrets that encourage faithfulness and endurance by emphasizing the consequences of actions in the afterlife. In addition, the progeny of the angels are referred to as the ‘sons of fornication’ (1 Enoch 10:9). While the Hebrew Bible often associates luxurious items with violence and oppression, the connection with sexual immorality appears to be a new development. The biblical tradition also speaks of fornication in relation to covenant unfaithfulness and idolatry but not wealth (1 Enoch 11:1) ... The distance implied between the seventy generations that the Watchers are bound and the Final Judgement points to an interim period in which the spirits of the bastard offspring continue to wreak havoc on humankind and lead them astray from worshipping God (1 Enoch 15:8–9; 19:1). This distance, taken together with the phrase ‘In those days’, implies an eschatological blessing for the righteous who suffer in this present age. Just as the giants destroyed the produce of mankind and carried out violence against them, in the future God will restore their previous losses and will bring about conditions of peace and truth. Language of the Deuteronomistic promise of blessing can be detected (Deuteronomy 28:12) ..."