داقّ صَاحِبَهُ الحِسَابَ

, verbal noun مُدَاقَّةٌ, (tropical:) [He was minute, observant of small things, nice, or scrupulous, with his companion in the reckoning; and so داقّهُ فِى الحِسَابِ;] (JK, K, TA;) he reckoned with his companion with minuteness: (TK:) it signifies an act between two. (TA.) [And داقّهُ فِى الأَمْرِ (assumed tropical:) He was minute, &c., with him in the affair, or case.] المُدَاقَّةُ فِى الأَمْرِ signifies ↓ التَّدَاقُّ; (S;) which is an instance of تَفَاعُلٌ from الدِّقَّةُ: (Sgh, K:) you say, ↓ تَدَاقَّا, meaning (assumed tropical:) They were minute, &c., each with the other. (TK.) You say also, داقّ النَّظَرَ فِى مُعَامَلَاتِهِ وَنَفَقَاتِهِ [He examined minutely into his dealings and his expenses]. (TA in article دنق.)

And [hence] مُدَاقَّةٌ, metonymically, signifies (tropical:) The being niggardly, stingy, or avaricious. (Az, TA in article دنق.)