English Explanation of Pirkei Avot 5:4

Ten miracles were wrought for our ancestors in Egypt, and ten at the sea.
Ten plagues did the Holy one, blessed be He, bring upon the Egyptians in Egypt and ten at the sea.
[With] ten trials did our ancestors try God, blessed be He, as it is said, “and they have tried Me these ten times and they have not listened to my voice” (Numbers 14:22).
The ten miracles that were wrought for our ancestors in Egypt were their being spared from the ten plagues that were afflicted upon the Egyptians.
The ten miracles that were performed at the sea are not mentioned in the Torah but are contained in a midrash and are listed as follows by the Rambam: 1) the sea was split; 2) the water formed a tent over their heads; 3) the land became firm (not muddy); 4) when the Egyptians tried to cross the land in the sea returned to being muddy; 5) the sea was split into 12 strips so each tribe could travel separately; 6) the water froze and became hard as a rock; 7) the water which became as a rock was actually many rocks and was beautifully arranged; 8) the water remained clear so that the tribes could see each other; 9) water that was fit for drinking leaked from the sides; 10) after they finished drinking the water, the water that was left immediately again froze.
The ten plagues that were wrought upon the Egyptians in Egypt are well known and listed in the Torah.
The ten plagues at the sea are, according to some commentators, the ten different verbs used to describe the death of the Egyptians in chapter 15 of Exodus, “he has thrown” (15:2); “he has cast” (15:4); “deeps cover them” (15:5); “they went down into the depths” (15:5); “dashes in pieces the enemy” (15:6); “You overthrow them that rise up against You” (15:7); “it consumes them like straw” (15:7); “the waters were piled up, the floods stood upright as a heap” (15:8); “they sank as lead” (15:10).
The ten times that the children of Israel tried God are as follows: 1) at the sea (Ex. 14:11); 2) at Marah (ibid. 15:24); 3) in the wilderness of Sin (ibid. 16:3); 4) with the Manna (ibid. 16:20); 5) again with the Manna (ibid. 16:27); 6) at Rephidim (ibid. 17:2); 7) with the golden calf (ibid. 32:1); 8) at Tavera (Numbers 11:1); 9) at Kivroth-taaverah (ibid. 11:4); 10) in the wilderness of Paraan, at the incident of the spies (ibid. 13:3).