You saw with your own eyes the great trials, and those miraculous signs and wonders.
Now that Moses had largely repeated the commands which the people were to observe as their part of the covenant, and the promises and threatenings which God would make good (according as they behaved themselves) as part of the covenant, the whole is here summed up in a federal transaction.
Commenting on Deuteronomy 29:1-9
The great temptations which thine eyes have seen,.... Or trials, the ten plagues which tried the Egyptians, whether they would let Israel go; and tried the Israelites, whether they would believe in the Lord, and trust in his almighty power to deliver them: the signs and those great miracles: as the said plagues were such as were beyond the power of nature to produce, and...
The great temptations which thine eyes have seen, the signs, and those great miracles: (c) The proofs of my power.