John Trapp on Amos 8:7

Verſe 7. The Lord hath ſworn by the excellency of Jacob] i. e. by himſelf the matter of Jacobs chief boaſting, there being no God like unto their God (their enemies themſelves being judges Deut. 32.31.) neither any nation ſo great as to have God ſo nigh unto them as Iſrael had, in all things that they called upon him for, Deut. 4.7. So that this oath of God grates upon their Ingratitude for ſuch imparallel priviledges, and it is uttered in great wrath, as appeareth by the following angry Apoſiopeſis (wherein the Apodoſis is not ſet down but underſtood.)

If I ever forget any of their workes] forget to puniſh them. Theſe oaths cum reticentia are very dreadfull.Pſal. 95. Take heed leſt by ſtubbornneſſe we provoke God to ſweare in his wrath that we ſhall not enter into his neſt. Take heed leſt a promiſe of entring being left us, and a profer made us, we ſhould ſeem to come ſhort of it,Heb. 4.1. [non-Latin text not transcribed] to come lag or late, a day after the faire, an houre after the feaſt. God is now more quick and peremptory then ever in rejecting men that neglect ſo great ſalvation Heb. 2.3. the time is ſhorter, he will not wait ſo long as he was wont to do.Mar. 16.16. He that beleeveth and is baptized ſhall be ſaved: he that beleeveth not, ſhall be damned. Surely God will finiſh the work, and cut it ſhort in righteouſneſſe: Rom. 9.28. becauſe a ſhort work will he make in the earth. The time is ſhort, ſaith the Apoſtle 1 Cor. [non-Latin text not transcribed] 7.29. a metaphor (ſay ſome) from a piece of cloth rolled up, only a little left at the end. Let us therefore feare (as the ſame Apoſtle inferreth upon the conſideration of Gods oath Heb. 3.18. with 4.1.) and let our feare not weaken but waken our diligence in well-doing, leſt he ſweare and repent not, leſt be come to a reſolution and decree (Gods oath is nothing elſe but his inviolable and invariable decree) to caſt us off, as he did Saul, for his wilfull diſobedience 1 Sam. 15. Saul lived long after his utter rejection, and men could ſee no alteration in his outward condition: but God had ſworn, as here, never to forget any of his works. Now ſaith Samuel to him (and it is fearefull) the Eternity of Iſrael (the Excellency of Jacob) will not lie, nor repent: for he is not a man that he ſhould repent. 1 Sam. 15.29. Do not think this a caſe that ſeldome comes: it is done every day upon ſome or other, ſaith a great Divine: but woe be to that man upon whom it is done: it had been much better for him that he had not been born, Mat. 26.24. Oh conſider this all ye that forget God. leſt he ſwear by his excellency, Surely I will never forget any of your works.