τούτῳ

From LSJ

French (Bailly abrégé)

dat. sg. masc. et neutre de οὗτος.

English (Strong)

dative case singular masculine or neuter of οὗτος; to (in, with or by) this (person or thing): here(-by, -in), him, one, the same, there(-in), this.

Russian (Dvoretsky)

τούτῳ: dat. к οὗτος и τοῦτο.