OET interlinear HERO (JDG) 7:12

uW Translation Notes:

Note 1 topic: figures-of-speech / idiom

בְּנֵי־קֶ֨דֶם֙

(Some words not found in UHB: and,Midian and,Amalek and=all sons_of east lying in,valley like,locust[s] to=increase_in_number and,to,camels_of,their not number like,sand which_[is],on language_of the=sea to=increase_in_number )

See how you translated this expression in 6:3.

Note 2 topic: figures-of-speech / simile

כָּ⁠אַרְבֶּ֖ה לָ⁠רֹ֑ב

(Some words not found in UHB: and,Midian and,Amalek and=all sons_of east lying in,valley like,locust[s] to=increase_in_number and,to,camels_of,their not number like,sand which_[is],on language_of the=sea to=increase_in_number )

The point of this comparison is that just as a locust swarm is very great in multitude, that is, extremely numerous, so this combined army had a very great number of soldiers. If it would be helpful in your language, you could make this point explicitly. Alternate translation: [in huge numbers, such as in a swarm of locusts]

Note 3 topic: figures-of-speech / hyperbole

וְ⁠לִ⁠גְמַלֵּי⁠הֶם֙ אֵ֣ין מִסְפָּ֔ר

(Some words not found in UHB: and,Midian and,Amalek and=all sons_of east lying in,valley like,locust[s] to=increase_in_number and,to,camels_of,their not number like,sand which_[is],on language_of the=sea to=increase_in_number )

The author is making an overstatement for emphasis. If it would be clearer in your language, you could express the emphasis in a different way. Alternate translation: [And they had so many camels that one could hardly count them]

Note 4 topic: figures-of-speech / simile

וְ⁠לִ⁠גְמַלֵּי⁠הֶם֙ אֵ֣ין מִסְפָּ֔ר כַּ⁠ח֛וֹל שֶׁ⁠עַל־שְׂפַ֥ת הַ⁠יָּ֖ם לָ⁠רֹֽב

(Some words not found in UHB: and,Midian and,Amalek and=all sons_of east lying in,valley like,locust[s] to=increase_in_number and,to,camels_of,their not number like,sand which_[is],on language_of the=sea to=increase_in_number )

The point of this comparison is that just as the grains of sand that are along the edge of the sea are very numerous, so this combined army had a very great number of camels. If it would be helpful in your language, you could make this point explicitly. Alternate translation: [And they had a huge number of camels, which seemed as huge as the number of grains of sand along the edge of the sea]